Nice. The descriptors of the tomes really fit well with the feel of the Carcosan rituals. And it reminds me that I was always impressed with the names of the Carcosan rituals, which are very evocative of a particular exotic evil.
On the execution it needs a little cleaning up, mostly the spacing of the phrases. For instance:
The Heinous Manual of Agony contains the following rituals:The Depthless Rite,Stench of the Liquescent Amoeba , and The Curse of the Heaving Mass .
It'd be better with spaces after the colon and the first comma, and none before the second comma or the period.