The secret adversary
Agatha Christie
Tommy and Tuppence (1)
A Gathering of Shadows: A Novel
V.E. Schwab
Shades of Magic (2)
Destroyer of Worlds
Larry Niven
Fleet of Worlds (3)
Life, the Universe and Everything
Douglas Adams
The Hitchhiker's Guide to the Galaxy (3)
A Parade of Horribles: Dungeon Crawler Carl, Book 8
Matt Dinniman