Where's Sonic? is an interactive picture book published by Ladybird in the UK. It follows the format of titles such as the Where's Wally? series. The book takes the reader through the zones of Sonic the Hedgehog 2. The book was followed by a sequel in the same vein, Where's Sonic Now?, which focused on the zones of Sonic the Hedgehog 3.
Another book, also called Where's Sonic? and using a similar format, was released in 2012.