Collaborative Piano is a term used to denote a field of the piano profession where a pianist works in collaboration with one or more instrumentalists, singers, dancers, or other artists. This field is also referred to with its former name as Piano Accompanying, a term which has traditionally implied inferiority, subservience, working "for" rather than "with" a recital partner. Collaborative piano, on the other hand, is a term that implies equality, association, and teamwork. [Source: Collaborative Piano Blog ]
Here is a list of books in the Roosevelt Library using the exisiting LC subject search "Musical accompaniment".