What children's books digestable by adults do you recommend?

In addition to some of the ones on here like His Dark Materials, I’ve recently really gotten into the Lockwood & Co. series. I watched season 1 on Netflix (canceled, by the way, though I thought it was well done) and it got me into the series. It’s fun, and while not spooky—to me, but my wife disagrees—it’s suspenseful!