Water Studies

In the early books of the Old Testament, the mysterious "Angel of the Lord" repeatedly appears—visibly, audibly, even physically—to the Patriarchs, to Moses, to the Prophets. Who is this Angel? Exploring the biblical texts, the testimony of church history, and the insights of Systematic Theology, Matt Foreman and Doug Van Dorn argue that the answer is beyond doubt: the Angel of the Lord is a manifestation of God the Son. Even more, they argue that this Angel appears more often than people realize, because he appears under different titles, including: the Word, the Name, the Glory, the ...

Whether you're aspiring or experienced, mastering water treatment is no small feat. From understanding the complexities of disinfection methods to mastering the intricacies of water chemistry, this guide is designed to equip you with the knowledge and skills needed to thrive in one of the most crucial roles in public health.

The first entry in Llewellyn's exciting new Elements of Witchcraft series, Water Magic reveals the amazing possibilities of using water in your modern practice. Once you learn to access the enormous depths of this life-giving and powerful element, it will enhance your magic and help you grow into a better version of yourself. 

This new version has more than 150 pages of previously unpublished material, including illustrated guides to Celtic pilgrimage sites, study questions, and updated research. Using story, scripture, reflection, and prayer, Kenneth McIntosh offers us a taste of the living water that refreshed the ancient Celts, allowing them to perceive God as a living Presence in everybody and everything. This Earth-based and inclusive perspective suggests life-giving alternatives to modern faith practices, opening the door to a Christianity big enough to embrace the entire world. "If you want to run away to ...

When it comes to the Sabbath, Christians have different ideas on what it means and how to observe it. For many people, it is a day to go to church and have fellowship with other believers. What they often miss, though, is that the Sabbath is intricately tied to rest and worship―both of which ultimately point to the Lord as our creator and redeemer. In this addition to the Short Studies in Biblical Theology series, Guy Prentiss Waters offers an introductory study of the Sabbath from the creation of the world to the consummation of all things when Jesus returns.

In this “captivating” (Harper’s Bazaar) and lyrical debut novel—perfect for fans of The Water Dancer and the Legacy of Orïsha series—the Yoruba deity of the sea, Yemaya, is brought to vivid life as she discovers the power of Black resilience, love, and feminine strength in antebellum...

You're one step away from the adventure of your life. John Ortberg invites you to consider the incredible potential that awaits you outside your comfort zone. Deep within you lies the same faith and longing that sent Peter walking across the wind-swept Sea of Galilee toward Jesus. In what ways...

In this classic book, Madeleine L’Engle addresses the questions, What makes art Christian? What does it mean to be a Christian artist? What is the relationship between faith and art? Through L’Engle’s beautiful and insightful essay, listeners will find themselves called to what the author views as the prime tasks of an artist: to listen, to remain aware, and to respond to creation through one’s own art.

Master the essential knowledge required for modern water system operation with Conquer the Drinking Water Operator Exam: Comprehensive Study Guide for Treatment Systems, Distribution Basics, Disinfection, Regulations, Monitoring, Hydraulics, Sampling, Compliance, and Safety. This guide delivers a focused and practical explanation of how drinking water systems function, from source collection through treatment, storage, and distribution. Designed for clarity and efficiency, the book explains technical concepts in straightforward language while maintaining professional accuracy. Topics ...

Master the essential knowledge needed to pass your plumbing exam with confidence. Conquer the Plumber Exam delivers focused, practical coverage of the plumbing trade, including safety practices, tools, materials, and system fundamentals. Designed for fast learning, this guide helps you build a strong foundation without unnecessary filler. This book walks you through critical topics such as pipe sizing, water supply systems, drainage and venting, fixtures, and water heaters. You’ll also gain a clear understanding of plumbing codes, including IPC and UPC concepts, along with real-world ...

This comprehensive study guide delivers a complete technical foundation for understanding modern water distribution systems, from pipeline hydraulics and pressure behavior to storage operations and system control. Each chapter explains how infrastructure components interact so readers can build a clear mental model of system function rather than memorizing isolated facts. The book explores essential operational concepts including flow dynamics, valve control, pressure stability, leak detection, system monitoring, and infrastructure reliability. Clear explanations emphasize cause-and-effect ...

Still Waters, Clear Minds is a Bible study guide created for autistic and neurodivergent thinkers who long for faith without overwhelm. Many traditional devotionals move too fast, rely on vague emotional language, or assume one "right" way to connect with God. This book takes a different approach. It slows the pace, respects structure, and meets you where your mind naturally works—with clarity, order, and depth.

This audiobook-friendly study guide delivers a focused, system-level review of journeyman plumbing concepts in a concise Under 90 Minutes format. It is designed for experienced plumbers who already understand the trade fundamentals and want a structured, efficient refresher of how plumbing systems function as integrated networks. The content emphasizes how water, air, and waste move through buildings, reinforcing technical understanding rather than rote memorization. Coverage includes drainage, waste, and vent systems, water supply distribution, backflow hazards and prevention, storm ...

In this lyrical and “profound” (Dr. Resmaa Menakem, New York Times bestselling author) companion to the “spellbinding” (Harper’s Bazaar) Shallow Waters, Oya—the Yoruban deity of the weather—is brought to life during 1870s America. Born in Cuba after her mother Yemaya’s adventures...

Protecting potable water systems requires a clear understanding of how backflow occurs and how prevention devices function under real-world conditions. Conquer the Backflow Prevention Device Worker Certificate Exam in Under 90 Minutes provides focused coverage of cross-connections, pressure relationships, and the mechanical principles that govern backflow prevention assemblies. This guide presents core concepts in a clear, practical manner designed for efficient learning and long-term retention. The book explores the full range of backflow prevention devices, including vacuum breakers, ...

A leaf from an oak tree . . . a wildflower . . . water from a sparkling stream . . . dirt from a cool dark cave-these are the age-old tools of natural magic. Born of the earth, possessing inherent power, they await only our touch and intention to bring their magical qualities to life. The four elements are powerful magical tools. Using their energies, we can transform ourselves, our lives, and our world. This much-loved, classic guide offers more than seventy-five spells, rites, and simple rituals you can perform using the marvelous powers of the natural world.

You're one step away from the adventure of your life. John Ortberg invites you to consider the incredible potential that awaits you outside your comfort zone. Deep within you lies the same faith and longing that sent Peter walking across the wind-swept Sea of Galilee toward Jesus. In what ways...

Water and wastewater operators play a central role in protecting public health, ensuring that treatment processes remain stable, safe, and responsive to changing conditions. This guide provides a comprehensive exploration of the entire treatment pathway, beginning with raw water sources and continuing through clarification, filtration, disinfection, distribution, and residuals management. Each chapter builds a foundation of practical understanding, helping operators recognize how individual processes support the broader system and how adjustments influence water quality. The book emphasizes...

In this strange and wonderful book, thirty elders of the ancient Hopi tribe of Northern Arizona—a people who regard themselves as the first inhabitants of America—freely reveal the Hopi worldview for the first time in written form. The Hopi kept this view a secret for countless centuries, and anthropologists have long struggled to understand it. Now they record their myths and legends, and the meaning of their religious rituals and ceremonies as a gift to future generations.

Master the essential concepts and practical skills required to operate a wastewater treatment plant with confidence. This comprehensive study guide covers biological treatment, clarification, disinfection, sludge management, chemical dosing, instrumentation, and laboratory testing. Each topic is presented clearly and concisely, emphasizing core operational principles while providing detailed insight into process control, hydraulic management, and effluent quality. Designed for operators preparing for licensing exams or seeking professional mastery, this guide balances technical depth with ...