Told and illustrated by Sandra Boynton with charm and pizzazz, Boo! Baa, La La La! is a captivating Halloween story, and a long-lost cousin of her classic Moo, Baa, La La La! Follow the gentle cow as she ventures out into the moonlit night, trying to discover who it was that replied to her BOO with a BAA . The surprise ending is certain to delight everyone—young or old, feathered or furry. BOO! On Halloween, the cow says BOO. She likes that word. It’s something new.