bA middle-grade mystery series that's spooky, creepy, and filled with gothic twists! Meet the Sinister-Winterbottom twins, who solve mysteries at increasingly bizarre summer vacation destinations in the hopes of being reunited with their parents--or at the very least finally finding a good churro. pAn absolute delight. If I have to die in a waterpark, I want to die in this one.b--bHolly Black, 1 iNew York Timesi bestselling author of iThe Cruel Princei pWickedly weird. . . . Will appeal to anyone who loved A Series of Unfortunate Events. b--biThe New York Timesib pMeet the Sinister-Winterbottoms brave Theo, her timid twin, Alexander, and their older sister, Wil. They're stuck for the summer with their Aunt Saffronia, who doesn't know how often children need to eat and can't use a smartphone, and whose feet never quite seem to touch the floor when she glides--er--walks. pWhen Aunt Saffronia suggests a week pass to the Fathoms of Fun Waterpark, they hastily agree. But the park is even st