The Trespasser's Unexpected Adventure: The Mystery of the Shipwreck Pirates Gold - Crime Stopper Kids Mysteries, #1

Foster teen, Logan Seagate, hadn't bargained on making friends with a mysterious family when he'd stolen his foster brother's abseiling gear and swung done a cliff to a private beach that morning. All he'd wanted to do was forget about how angry he was at his father for awhile; but his plans are cast aside when he meets the adventurous 'Captain Happy'. After spending an exciting day with her and her cloak-and-dagger secretive family, he learns there is a lot more to this mystery family than laughter, money and adrenalin thrills.  As they all spend more time together, Logan notices some unusual things...
the boat that watches them from sea, an old coin in a cave, rough-looking thugs taking an interest in them, and people he knows and trusts acting strangely. It turns out he is completely right to think trouble is just around the corner... Readers Say:"What a feel good, great read! It has a bit of everything; family, friendship, action, suspense, laugh-out-loud wit, fight scenes, racing cars and more.""This adventurous kid's story had me hooked from the very beginning.
It was more exciting than some of the adult fiction I usually read."