"Gary has been snail-napped and SpongeBob is on the case. Full-color, die-cut tabs introduce the suspects and 32 pages of puzzles and mazes provide the clues, so that kids can help solve the mystery. The back cover includes a cutout optical illusion."
This book has a similar plot to the third SpongeBob SquarePants feature film, The SpongeBob Movie: Sponge on the Run, as both involve Gary being "snail-napped." Both this book and the movie also use the aforementioned word in their descriptions.