I haven't done much in Dask and never heard of Ray, so might not be applicable directly. But a general book about distributed systems that I highly recommend a

I haven't done much in Dask and never heard of Ray, so might not be applicable directly. But a general book about distributed systems that I highly recommend and one you'll see often referred to on HN is Designing Data-Intensive Applications. Seriously great book and one I often go back to for fundamentals about distributed systems.