Sanderson has used extensive reading and clinical experience to develop a resource that will help counsellors, and I suspect their clients, to work with shame, rather than avoiding it.
What does "work with" mean here?
I have checked this thread: The use of "work with" vs. "work at/on"
Phrasally, it means to (A) use X, typically toward completing a task or project, or (B) rely on X for assistance with or make sure X completes a task or project.
But here I think shame is not a tool and not something that a therapist relies on for assistance.