Into the Wilds Volume 2: Battlemap Books by Tom Cartos

There are 6 books in the Into the Wilds series, each themed around a particular biome or region commonly found in many TTRPG settings. The books are: 

• Volume 1 - Forests & Villages, Deserts & Jungles, Mountains & Oceans

• Volume 2 - Caves & Caverns, Dungeons & Crypts, Swamps & Ruins

The box sets also include a GM Screen with quick rollable encounter tables to match the battlemaps, and 2 additional double-size fold out maps.