In this nearly wordless picture book, Wiesner takes readers on an imaginative voyage, using everyday reality merely as a touchstone. A squadron of frogs soar through the night air one Tuesday, squatting upon lilypads that they use as flying carpets. Apparently intending no harm, these mysterious visitors to a suburban development leave a minimum of disruption as evidence of their eerie flight: a few startled eyewitnesses, some scattered lilypads and a spooked dog. Wiesner's visuals are stunning: slightly surrealistic, imbued with mood and mystery.  Ages five and up.