This really worked for me. I used it to brush up on Spanish before traveling to Central America. I had studied Spanish in school but never felt comfortable speaking. It seemed overly simple. However I followed the directions exactly. I was shocked at how effective it was. I had the confidence to speak in situations that would have caused me to grapple for words in the past. Successive units quickly add terms and expressions but the pace is amazingly manageable.
"Alphabetical" is a pleasant read/listen, and, unlike many books about linguistics, seems well grounded in actual facts. Author Michael Rosen reads it marvelously in his British-but-not-posh accent. With this book you get an interesting and educational, if not very profound, look at alphabets and other phonetic/linguistic phenomena.
By the way, Rosen tells the reader to consult "the PDF" several times for written examples of alphabets, etc., which he refers to. This file can be found on the Audible.com page for this audiobook, at the end of the Publisher's Summary. Just click where it says "Download the accompanying reference guide."