Another thrilling Zac Power adventure! There's a sinister invention at Shark Park that's about to be unleashed! Zac's spy senses are on high-alert. He must ride the scariest roller-coaster, stop the invention and save the world.

p>24 hours to save the world . . . and go to a birthday party! Zac Power gets pulled away from an Axegrinder concert to spy on BIG's annual conference. Zac's mission is to go undercover and bug the conference. However, BIG just happens to be holding their meeting at Shark Park, the world's scariest theme park! While there, Zac uncovers a plot that's even more evil than the dreaded White Pointer roller-coaster. Can Zac brave the rides and find out what's really going on at Shark Park?

Zac needs to find the top-secretblueprints before his arch- enemy does!Can he win the race AND escape theMurky Swamp?

Olive Corbett is not crazy. Not anymore. She obediently takes her meds and stays under the radar at school. After “the incident,” Olive just wants to avoid any more trouble, so she knows the smartest thing is to stay clear of the new girl who is rumored to have quite the creepy past. But there’s no avoiding Miranda Vaile. As mousy Miranda edges her way into the popular group, right up to the side of queen bee Katie – and pushes the others right out – only Olive seems to notice that something strange is going on. Something almost . . . parasitic. Either Olive is losing her grip on reality, or Miranda Vaile is stealing Katie’s life. But who would ever believe crazy Olive, the girl who has a habit of letting her imagination run away with her? And what if Olive is the next target? A chilling psychological thriller that tears through themes of identity, loss, and toxic friendship, Shift will leave readers guessing until the final pages.

INSTANT USA TODAY BESTSELLER “Witty and macabre.”—Caroline Kepnes "Slick and chilling."—Megan Miranda “A perfect summer book.”—NPR USA Today bestselling author Samantha Downing is back with her latest sneaky thriller set at a prestigious private school—complete with interfering parents, overeager students, and one teacher who just wants to teach them all a lesson… Teddy Crutcher has won Teacher of the Year at the elite Belmont Academy, home to the best and brightest. He says his wife couldn’t be more proud—though no one has seen her in a while. Teddy really can’t be bothered with a few mysterious deaths on campus that are looking more and more like murder, or with the student digging a little too deep into Teddy’s personal life. His main focus is pushing these kids to their full academic potential. All he wants is for his colleagues—and the endlessly meddlesome parents—to stay out of his way. If not, well, they’ll get what they deserve. It’s really too bad that sometimes excellence comes at such a high cost.

A naïve divorced mother of two faces the darkest parts of herself in this heart-stopping thriller from the author of USA Today bestseller, The Girl With All the Gifts. Liz Kendall wouldn't hurt a fly. Even when times get tough, she's devoted to bringing up her two kids in a loving home. But there's another side to Liz -- one that's dark and malicious. She will do anything to get her way, no matter how extreme. And when this other side of her takes control, the consequences are devastating. Love her or hate her: there are two sides to every story. . .

Another thrilling Zac Power adventure! A GIB agent has gone missing in the mysterious Black Triangle deep underwater. Can Zac find him among the sea of shipwrecks before it's too late?