Books in [The Jill Graham mystery series] series

Are you up for a thrilling adventure?Meet Joe, Amy, Sarah, and Will. Together, these intrepid youngsters spend their holidays solving mysteries in 1950's Britain.Enjoy these three exciting stories: The Mystery of Smugglers CoveWhen twelve year old Joe and his two younger sisters visit Smugglers Cove for the summer holidays, they get caught up in a thrilling adventure that is beyond their wildest imagination. Follow the children as they flee down a river, are chased by ferocious dogs, locked up in an old manor, get lost at sea, expose a spy, and more!The Mystery of Adventure IslandWhen the Mystery Kids go camping on a deserted island off the coast of England, they fall headfirst into another exciting adventure. Follow the children as they are trapped in a lighthouse, stow away on a seaplane, get lost in a mine, hide in a tree house, outwit birdwatchers, and more!The Mystery of Hidden ValleyWhile camping in Wales, it doesn't take long for the Mystery Kids to stumble across a long-lost tunnel that leads to a valley full of secrets. Follow the children as they are imprisoned in an old farmhouse, discover a hidden cave, sabotage a plane, rescue a missing man, undertake a perilous climb, and more!These adventure stories will suit people who enjoy Nancy Drew, the Hardy Boys or the Famous Five.