Gravity Falls:: Dipper and Mabel and the Curse of the Time Pirates' Treasure! - Jeffrey Rowe - Bog

Blendin Blandin is searching for the legendary Time Pirates' Treasure, and he needs Dipper and Mabel's help... and yours, too! Journey through time and explore the dragon-infested medieval era, the Weird-and-Wild West, and the laser-and-giant-baby-filled future. YOU choose from multiple paths that lead to different wacky adventures! You might end up finding the greatest treasure ever known, or you could send the twins and Blendin into an abyss from which they will never escape!