Can anyone recommend a book, that deals with purely functional algorithms? I already have "Purely Functional Data Structures" by Okasaki, which I began working

Can anyone recommend a book, that deals with purely functional algorithms? I already have "Purely Functional Data Structures" by Okasaki, which I began working through, but still have a long way to go. However, it is about data structures, not about algorithms, strictly speaking. Perhaps there is a book for algorithms that does it the functional way? Probably a lot of it comes down to naive versions of algorithms using functional data structures and then some changes in the algorithms due to optimizing for functional data structures?