Sam and the Firefly (P.D. Eastman)

Summary: The dynamic duo of Sam and Gus soar through the air writing words in the night sky.  But when Gus's words end up causing confusion and chaos for people on the ground, it's up to Sam to help Gus "write" his wrongs.  (from amazon.com)

Where can I find it?: Boston Public Library: Brighton, Charlestown, Egleston Square, Hyde Park, Jamaica Plain, South Boston, and Uphams Corner brances, and as an ebook at https://bpl.bibliocommons.com/item/show/3109886075 

Tags: Fireflies; Owls; Signs and signboards; Skywriting