I mostly read ScFi /Fantasy and when I found myself re-reading the xanth collection while waiting for a new release from 1 of the few authors I follow who are still alive I actually subscribed to kindle unlimited. Alot of the offerings are kinda fluff, but I read an average of a book a day or every 2 days so for the price,it was worth it for me. This article is pretty good at describing Amazons 2 offerings and the cost of each along with the pro's & cons. https://www.hookedtobooks.com/kindle-unlimited-vs-prime-reading/
As to some suggestions from MY collections, I'd say Glen Cooks Black Company series(9 main,2 splinter books),Piers Anthony's Incarnation's Of Immortality series(Incarnations of Immortality is the name of an eight-book fantasy series by Piers Anthony. The books each focus on one of eight supernatural "offices" (Death, Time, Fate, War, Nature, Evil, Good, and Night) in a fictional reality and history parallel to ours, with the exception that society has advanced both magic and modern technology. The series covers the adventures and struggles of a group of humans called "Incarnations", who hold these supernatural positions for a certain time.)
Mercedes Lackey her Heralds Of Valdemar series(38 novels so far... and 14 anthologies) , her 500 Kingdoms series(6 full length books & a short story), and her Elemental masters series(16 full novels & 2 anthologies) are all rather good.
For your detective fix, I recommend trying the Garret P.I. series by Glen Cook 14 books. "Garrett P.I. is a series of fantasy novels by American writer Glen Cook about Garrett, a freelance private investigator. The novels are written in a hard-boiled detective fiction style, with elements of traditional mystery and dialogue-based humor. Garrett, during his adventures in his home city of TunFaire and across Karenta and the Cantard, has to deal with elves, vampires, centaurs, trolls, and numerous mixed breeds, along with gods, wizards, witches and more." <--- from Wikipedia....