Readers who commit to the delirious internal logic The Sinister Summer Series with the enthusiasm of a preteen committing themselves to the thrills, chills, swoops and swirls of an actual waterslide are in for a great ride! Kiersten's Alexander and Theo Sinister-Winterbottom, along with older sister Wil and their extraordinarily mysterious Aunt Saffronia, must dive into the depths of the decidedly peculiar Fathoms of Fun and its denizens. Perfect for fans of "Phineas & Ferb," and "Gravity Falls," with a sound sense of familial bonds, plus enthusiastic word play.