The Book of Wondrous Inventions is useable with both the D&D and the AD&D game systems. Each invention is clearly outlined, including function, form, and hazards of use. Statistics and spell details are presented in a manner compatible with both game systems. Adventure scenario suggestions are given, as well as design instructions for characters who wish to build a duplicate device.

As an added bonus, a section is included which details a system for creating spells and magical items. This will prove especially useful to players and DMs who use the D&D game system; the detailed information is also of help to AD&D game players.