Lower! Higher! You're a Liar! Book

“Sturdy and sensible Molly has been 10? ‘for a million years’ — and it’s a long, hot, boring and lonely summer while her best friend is away. But when another girl’s bracelet is finagled away from her by tough, nasty Celia, Molly’s summer becomes a mini-adventure as she sets out to get it back. Children intimidated by bigger kids will cheer her courage, all while learning, as Molly does, that often things are not as simple as they seem.” — School Library Journal