I have extended it to June 1st because I think starting on June 9th is silly. I am adult, I don't get summer break, and finishing 25 adult sized books in 3 months is hard.

Bingo challenge, read 25 books (blackout) and be entered for extra prizes. Five prompts read in a row can be redeemed for a $5 coupon. See the bingo board and more details here: https://www.powells.com/list/summer-reading-challenge