Robin's Reward — Nicole Hart

It wasn't fair! Robin, the baby of her family, was now the only one left at home over the summer.
Her brother and sister were away doing glamorous things. There was no one for her to hang out with but pesky Eustice, and he was acting superior as usual, even if he was growing up to be quite a hunk. There was only one bright spot: Robin's friend, Lily, was coming to visit. Perhaps the two of them could scare up something to do, for example… a little romance and a touch of mystery.