I've seen a few reviews that note this is more of the same of the Callahan books, but I've only read one before now, a collection of very early short stories, maybe the first of the Cross-Time Saloon stories, and that was several years ago. So this was all new to me. I was able to follow it all, even though I've obviously missed a lot of the history of the characters. It was a fun read for me, though sometimes I felt like an outsider looking in, wondering about the books I've missed. This isn't a deep book, just a fun read about a tight group of interesting characters.