I'm a lifelong reader, and have many favorites (all my hens are named after female authors) but I'm not going to name them here, well maybe a few. First though, I will tell you what I do, when I have run through a favorite series, and don't know what's next. Go to the library and pick a book at random off the shelf, any book, don't even look at the cover. Sit down at the library and spend 15 minutes reading it. If it has grabbed your attention, check it out, if not, put it back and grab another. Another thing I do, if there is a movie I have liked, or think I may want to see, see if it is based on a book. The book is always better than the movie, IMO, and even when you know the ending, there is so much more to be learned about the characters than can be portrayed in a book. Since you like mysteries, I will recommend Nevada Barr's Anna Pidgeon series, all set in a different National Park and The Number One Ladies Detective Agency series, by Alexander McCall Smith.