You searched for: “bibliotherapy
bibliotherapy (s) (noun), bibliotherapies (pl)
A nonphysical, psychological technique in which the patient is induced to read books which is used in treating mental illness: "The reading matter recommended must be selected individually for the specific patient, depending on the goals of bibliotherapy, the intellectual capacities of the patient, and his/her stage of achievement in bibliotherapy."

"The use of reading material in bibliotherapy is also utilized for nervous diseases."