I took a break from The Expanse series to read
The Science Fiction Hall of Fame, Volume One 1929-1964 after picking it up for Kindle for a couple of bucks. I'm on the second to last story ("Flowers For Algernon", which I last read in the 5th grade) and the stories have been pretty good. The only one I didn't care for and didn't finish, was "The Roads Must Roll" by Heinlein. There have been a few WTF? stories too, especially "The Country of the Kind," by Damon Knight but overall worth the read. I was worried that they would be really dated but that hasn't really been an issue.