My comfort reads are Sherlock Holmes pastiches. My sense, which may or may not be correct, is that Nicholas Myer opened the floodgates to these in the 1970s with The Seven Percent Solution. It got a lot of attention back when it was written. It appears that these are Myers's comfortable spaces as well. In The Return of the Pharaoh he gives Dr. Watson's wife tuberculosis, a face mask, and an excuse to travel to Egypt. Hijinx ensue, involving pyramids, Howard Carter, and of course, Sherlock Holmes. Myers doesn't capture the essence of Holmes as well as others; for my money, Lyndsay Faye is the best at that. This is partly because he's removed the pair from Baker Street and London. He's competent enough, though, and wandering around the Valley of Kings with the two of them was enjoyable and entertaining.