Monster Girl Encyclopedia World Guide - Side III

Monster Girl Encyclopedia World Guide - Side III (魔物娘図鑑ワールドガイド外伝Ⅱ), referred to as World Guide Side 3, is an upcoming world guide supplement by Will.

The book was announced via a post on Kenkou's website.

Synopsis
This book features sea-based monster girls, delving into various aspects of underwater life; very similar in style to the previous world guide side.