All right, you lily-livered landlubbers! Get ready to sort, match, make sets, and practice other basic math skills by hiding treasure chests on deserted islands, filling the seas with ocean-going creatures, and more. Full color. plus 75 reusable stickers.
Books can be attributed to "Unknown" when the author or editor (as applicable) is not known and cannot be discovered. If at all possible, list at least one actual author or editor for a book instead of using "Unknown".
Books whose authorship is purposefully withheld should be attributed instead to Anonymous.