The summer leading up to the sixth grade was supposed to be quiet and easy for Jake Baker. Instead, he finds himself trying to save the world. A series of strange events in his neighborhood leads him and his Greene Street Gumshoes into something far more dangerous than the usual lost dog case. An ageless sorcerer named Count Sugar Cain and his associate, mad scientist Dr. Beamo, are on the verge of conquering the town of Avalon and after that, the world. The Gumshoes are standing in their way. Jake and his friends are pulled deeper into a world of magic and mystery as they try to stop the nefarious Sugar Cain. Along the way, Jake discovers secrets about his family that will forever change both his life and the lives of those around him. Will the Gumshoes prevail? Will Jake live through the summer to make it to middle school? And why does his best friend Shellie keep trying to hold his hand? Find out in Great Big World: The Trouble with Dr. Beamo