Project Hail Mary
Andy Weir
Camp Jupiter Classified
Rick Riordan
The Trials of Apollo (4.5)
Fire World
Chris D'Lacey
The Last Dragon Chronicles (6)
The House of Hades
The Heroes of Olympus (1)
The Letters of J. R. R.Tolkien
J. R. R. Tolkien & Christopher Tolkien & Humphrey Carpenter