The following books exist:

The Red General‘s book
Mechanical Devices Illustrated and Annotated (owned by Rosie Printer, another copy owned by the Clever Man's Works)
Love Matters – relationship manual, by Mindhealer Lily and a colleague (copies owned by Hope, Briar and Rosie), based on:
A Treatise Concerning the Arts of Love: For the Instruction of the Inexperienced (owned by Victory)
Cheerful of Narrowneck’s The Methods of Sleep (owned and used by Victory and Determined)
Methods and Techniques to Attain Command of Oneself and Others, an anonymous book by an Elvish author, discovered by Victory in her family’s library and later communicated to Determined. It includes graded exercises, and instructions for the mindmagic known as “glamour”.