Last Life continues and concludes the tale of Prosper Redding, following the main cast of characters downstairs as they try to rescue Prue. Fiendish fun is a superb description of the adventure, relationships, and conclusion of this highly recommended duology.
The relationship between Prosper and Alastor is fantastic, and I love that they never lose that. It is a great source of amusement and the insults between the two and in general in the book are wondrous.
As usual, Bracken does an amazing job with character arcs and she'll pull you along on the roller coaster of thoughts and emotions so that we come out as better people too. There are a few moments where the feels really hit you, which is always a plus.
The world-building about witches is amazing and one of my favorite parts about the books. The spells, their power source, their history - I would read a book just about them. The creatures from downstairs were ghastly (in a good way) and well-explained so I did not feel confused with all the new characters and beings. I especially liked the elves and essentially their lore and Prosper's reaction to them.
There are fantastic themes of legacy and fitting in and doing the right thing, as well as history and fate and making mistakes and learning from them. There's even important lessons in decisiveness and believing in yourself and the capacity for change.
The ending was great, the loose threads tied up, no deus ex machina, a realistic turn of events and shared responsibility, great twists, and a satisfying conclusion.