The Sinister Summer

A 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...

The spooky summer adventures of the Sinister-Winterbottom twins continue in another gothic mystery: can Theo and Alexander solve the secret of the Sanguine Spa in the little Transylvania Mountains? The second book in the new Sinister Summer series by #1 NYT bestselling author Kiersten White...

The third book in the middle-grade series that's part Scooby-Doo, part A Series of Unfortunate Events, and entirely genius! Follow the Sinister-Winterbottoms on their most outrageous adventure yet, when they find themselves at a normal summer camp! After leaving the Sanguine Spa in pursuit of...

Book four in the tragic series about the Sinister-Winterbottom twins, who must solve one wretched mystery after the next, brought to you by #1 New York Times bestselling author KIERSTEN WHITE. The electrifying penultimate adventure finds the Sinister-Winterbottoms at the manor of Mr. Frank and...

Giant battle robots! Cotton candy betrayal! Blasts from the past! And the ultimate challenge to stay true to themselves and each other await Theo and Alexander in the final book in the tragic series about the Sinister-Winterbottom twins, who must solve one wretched mystery after the next...