Most of these I really enjoyed and found that reading short stories helps with keeping your concentration.
https://www.bookcrossing.com/---/14583882/
Yes! I was having a bit of trouble concentrating on reading and an anthology got me back in the groove. Now I have returned to my big brick of a novel, "The Shell Seekers" by Rosamunde Pilcher:
https://www.bookcrossing.com/---/11952602/
It's really good and keeping my interest despite its length.