The Book of Ebon Bindings is a supplement for roleplaying in M. A. R. Barker's world of Tékumel. The 82 page book begins with an introduction to the religion of Tsolyánu, its deities and cosmology, magical arts, the planes of being and the creatures thereof. The remainder is a translation of The Book of Ebon Bindings, a complete and detailed text on the subject of Tsolyáni demonology.