I'm not ok ... looking for book recommendations that will chase the blues away

Hi there,
I saw a psychologist for the first time today and she recommended lots of coping strategies plus a book to read “The Happiness  Trap”.
i haven’t actually read it yet but she specialises in cancer patients so thought I’d pass it on.
Also when I was in hospital I read “ The Pilgrim” which was very “page turning”  and took my mind off things.