Brian and Pea Brain go to a science fair in order to do research for their dinosaur project for school and come across a mammoth mystery that they need to solve in order to save their science project from ruin. Reprint.
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Book Description Harper Trophy, New York, 1995. Soft cover. Book Condition: New. No Jacket. Ulrich, George (illustrator). First Paperback Printing. One in series about Brian and Pea Brain and their school stories. Bookseller Inventory # 4664