A seaside holiday - and a thrilling mystery for Jill. What on earth is her brother Tony up to? Why is he being so secretive about his new friend Sam [getting on the wrong side of Dad in the process] - and why are they looking for the boy with a fringe? When Jill takes up the trail with best friend Lindy, it leads the girls straight into danger... "Far better than the run-of-the-mill adventure story" - THE GOOD BOOK GUIDE TO CHILDREN'S BOOKS As told to Anne Digby, author of the Trebizon books and the Further Adventures of Enid Blyton's Naughtiest Girl..