Another First Chance (by Robbie Couch)

You know I'm always going to run, not walk, to any queer RA speculative fiction. (As long as it's not fantasy.  It's a fine line.)

This one has a kid grieving the death of his best friend sign up for a mysterious weeklong experiment called the Affinity Trials. How he gets recruited into them is somewhat convoluted but then we watch the Trials happening, we watch him make new friends and wonder what the researchers running the trials are truly hiding and what their real agenda is. 

(When you find out the answer, you too may find the experiment design somewhat nonsensical.) This book had a slow start and setup, but I powered through (read this while getting my hair done for five hours) and enjoyed the reveal and the ending.  Wasn't at the level of More Happy Than Not, but still enjoyable.