Judging by the arcane symbols printed on its cover, it is clear that this book is imbued with magical properties of one sort or another. Until you attempt to either read or identify it, however, its precise nature will remain unknown to you.
This amazing tome contains theoretical musings on the construction and control of golems. It also explains how to use the manual to temporarily conjure a servant of assembled flesh which will obey the creator without question. One must have a minimum Intelligence of 16 to understand the contents.