"Chocky" by John Wyndham was quick/fun. A little uneven but enjoyed "All Our Wrongs Today" by Elan Mastai. Tough to get thru for me but many seem high on "The Three Body Problem" books by Cixin Liu.
Some others that are not scifi but enjoyed this year:
"Trick" by Domenico Starnone
"Such Small Hands" by Andres Barba
"Convenience Store Woman" by Sayaka Murata