Louanna and Vickey must stop an evil man from hurting a racehorse.

When Mr. Johnson brings a box of books to sell at the family shop, Louanna notices certain phrases underlined. Another man, Jerry Driver, wishes to purchase the books immediately. Louanna discovers the clues that tell of a horse being injured before the big race. Louanna and her friend Victoria go to spy on Mr. Johnson. Jerry Driver shows up and threatens Mr. Johnson. Louanna talks to Mr. Johnson and finds out the important messages are underlined in yellow. Louanna goes back to read the underlined parts in the books. She returns to Mr. Johnson's only to be confronted by Jerry Driver. Will Jerry Driver harm Louanna, Mr. Johnson, and the horse?—Anonymous