Happy to follow along with another Book thread! I also am an avid audio-booker and utilize Libby as my resource. I love to read hard books too, but I feel more productive when I can combine reading with something else (quilting, cooking, gardening, etc).
In a fantasy-ish genre, I enjoyed Dreamfall by Amy Plum, I will be waiting for the sequel to find it's way to audio. And How to Summon a Fairy Godmother by Laura J Mayo was a fun/different perspective on the old Cinderella classic. Neverwhere by Neil Gaiman is one I've re read more than once and I've enjoyed several of his other books. The Night Circus by Erin Morgenstern.
Other fiction titles I would recommend are: The Wedding People by Alison Espach. Vera Wong's Unsolicited Advice for Murderers by Jesse Q Sutano. Sold on a Monday by Kristina McMorris.
Non fiction is not my traditional go-to book of choice, but I did like David McCullough's The Wright Brothers and Wild by Cheryl Strayed.
Not sure if those are repeats from the other thread, I don't recall where I picked up the recommendations.
I will be following along to add more books to my list!