This exhilarating sequel to the #1 New York Times bestseller The Mystery of Locked Rooms follows the famous Deltas as they race to complete the most challenging escape room they've ever faced...and confront their fears in order to save their friendship.It's been just over a year since Sarah, Hannah, and West made it through the epic funhouse that changed their lives forever. Since then, the three best friends have been working for Mr. William Taters, the owner of that very funhouse, renamed The Delta Game, and completing every challenging escape room they can.But then a strange invitation shows up from the ominous and cryptic owner of a new funhouse--The Mystery Mansion.The Mystery Mansion claims to be the biggest and best escape house ever, and it's opening just miles away from The Delta Game. The mysterious owner has invited the trio to come test it on opening day, offering a ten-thousand-dollar prize if they successfully escape. The prize is exciting, but the three friends don't want to be a walking advertisement for a competitor to their beloved The Delta Game.But maybe the only way to keep their funhouse in business is to accept the invite, escape the mansion in record time, and show just how boring and easy it is by comparison. The trio arrive on opening day, armed with their "fortune favors the bold" attitude. Unfortunately, their plan quickly goes awry. Secrets threaten their friend group, nothing in the house is as it seems, and this time, not everyone is playing fair...