Hmm... my signature link is chock full of books I've read and reviewed, if you're exceptionally bored (and I mean exceptionally - north of 1000 reviews)...
When I'm in a lull, I change up genres or age categories, or try some short story collections/anthologies. I'd suggest Neil Gaiman, but he can skew dark, and you didn't want dark. If you're up for middle grade, Bruce Coville's anthologies and collections are always entertaining, if a bit older.
As for books that I really enjoyed, off the top of my head:
The Thorne Chronicles, K. Eason. YA SF/F mashup, fairy tale tropes in a space opera "multiverse".
The Stone Girl's Story, Sarah Beth Durst. MG fantasy, standalone tale in a world where stone carvings can be brought to life.
Catherynne M. Valente. Pretty much anything, but if you want stuff that's not as dark (except maybe between the lines), try Space Opera (like Hitchhiker's Guide to the Galaxy meets Eurovision in the best possible way), Osmo Unknown and the Eightpenny Woods (MG standalone fantasy), or her Fairyland series (MG fantasy).
Nevermoor: The Trials of Morrigan Crow, by Jessica Townsend. MG fantasy, some darkness but very enjoyably done.
Time Travel Dinosaur, by Matt Youngmark. A "Chooseomatic" story with time travel, dinosaurs, and more laughs than I've had in eons...
The Finder Chronicles, Suzanne Palmer. Adventurous SF series with a bit of a throwback feel (but without the throwback stereotypes/attitudes), about a wayward Scotsman whose knack for finding things gets him into a galaxy's worth of trouble.
Terry Pratchett. Pretty much anything by him's worth a read (or reread).
The Singing Hills Cycle, by Nghi Vo. Ongoing novella series, interconnected but each essentially standalone, following a cleric and their talking hoopoe bird as they travel their Asian-inspired realm recording stories and history, and often getting tangled up in scrapes and stories themselves.
The Brian Robeson books, Gary Paulsen. Classics for a reason, MG adventures of a city boy stranded in the Canadian wilderness who learns how to survive and find meaning and even beauty in the green world. (Also recommended are other titles by him, particularly Gone To The Woods, his autobiographical tale of a young boy's first awakening to the wonders of the wilderness). Paulsen could make the land come alive in a way many writers aspire to but never reach.
For starters...