One of the online resources we subscribe to and bring to our member for free. If you liked an author, this site suggests others in the same vein. You will need to login with your borrow number to get free access.
Happy/sad, long/short, gentle/violent... This is a fun site. You choose from these and lots of other themes, and set sliders for the degree you wish them to be in your book. Then search and see what suggestions you get.