Tobuk (book)

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Tobuk is a polar bear from one of Greg's comics, "Wise Up, Mr. Shropsharp!" He ends up saving Mr. Shropsharp's life because he was sitting on a nearby iceburg and swam to save Mr. Shropsharp, who was drowning. In the online version of "Wise Up, Mr. Shropsharp, Tobuk is an eskimo instead of a polar bear.