The Boulder Public Library is selling off what it describes as “tons of children’s books” at the super-bargain price of two books for a buck. Adult fiction, history, self-help, art books, cookbooks and more are $1 or $2 each. The sale takes place on Saturday, June 2, 10 a.m. to 5:30 p.m. and Sunday, June 3 from noon to 6:30 p.m. in the Boulder Creek Meeting Room, Main Branch, Boulder Public Library, 1001 Arapahoe Ave., Boulder.