The Tortle Package 20
One Grung Above 18-2=16 only 4 pages? That's not a book, that's a pamphlet.
The Lost Kenku 6
Lost Laboratory of Kwalish 22
Locathah Rising 14
Infernal Machine Rebuild 16
Monsters Malevolent and Benign 23
Domains of Delight 25+1=26
Minsc and Boo's Journal of Villainy 24