Blood shark / Dahl, Michael

A school field trip. A pit filled to the brim with fossils. A valuable shark tooth over a million years old. And one bad boy who doesn't know better than to steal from mother nature. Modern-day sharks only live in the ocean, but Professor Igor proves that prehistoric shark fossils can be found anywhere. And where there's shark fossils, razor-sharp teeth aren't far behind...

Professor Igor tells the story of Taylor who, while on a school field trip looking for fossils, stole a student's wallet and buried it next to a fossilized shark fin, but when he came back the next day to retrieve the wallet he found that there are also fossil teeth, and not all the sharks were entirely dead.