Copy right 1988 Harcourt Brace Jovanovich, San Diego; 1st edition, with original dust jacket has a notch cut out to inside flap. The jacket and book are in very good vintage condition with clean, unmarked pages. There is a small "HBJ" publishers stamp on the front end paper. Charming color illustrations by Jane Dyer. Piggins solves a picnic mystery, the gathering was a surprise party for Piggins. Book measures about 10.5 by 9 inches.