Grandmas at the Lake by Emily Arnold McCully (An I Can Read Book, Very good, 1990, HC, 63 pages, HarperCollins)

Used in very good condition: cover and pages have very light wear. ISBN 0060241268

Grandma Nan and Grandma Sal invite Pip and Ski to the lake. Pip and Ski can't wait to get there. But as soon as they arrive, the trouble begins! Finally, Pip and Ski strike a bargain with the two grandmas. "Promis to let us have fun," says Pip. And they do!