From the back cover:
This is the second in a series of groundbreaking AD&D® accessories. Within these pages are nearly 70 fully developed adventures that can be inserted into any campaign. They are ready-to-play challenges for all levels of characters. DMs need not spend long hours creating diversions for their players—we've done it for you.
If you have The Book of Lairs, you already know what you'll find herein. These mini-adventures are arranged by terrain type (city, desert, hills, mountains, forest, etc.), with monsters in alphabetical order for easy access. At the back of the book is a combined monsters statistics table, showing all the necessary figures at a glance.
These are familiar monsters (like the gnome, brownie, and ettin) and not-so-familiar ones (like the bakemono and tengu), from both original AD&D sources and the Oriental Adventures book. Some of these mini-adventures are mere diversions; others can turn into minor campaigns! In any case, DMs and players alike are sure to be pleased with The Book of Lairs II.