Sam the Owl and Gus the Firefly literally light up the sky in this classic Beginner Book edited by Dr. Seuss. In Sam and the Firefly, P. D. Eastman (author of Are You My Mother?and Go, Dog. Go ) introduces us to the dynamic duo of Sam and Gus, who soar through the air writing words in the night sky. But when Gus s words end up causing confusion and chaos for the people on the ground, it s up to Sam to help Gus write his wrongs.