Captain Underpants: Book 13

The thirteenth installment in the Captain Underpants series (Captain Underpants and the Deathly Destruction of the Dastardly Doppelganger) is a continuation of the 2015 novel Captain Underpants and the Sensational Saga of Sir Stinks-A-Lot, and will be released on June 30, 2018.

Synopsis
George and Harold continue to voyage across time and space using Melvin Sneedly's Robo-Squid suit. Little do they know that every time they travel through time, they rip the fabric of space-time more and more. Eventually, an evil clone of Captain Underpants is created! George and Harold begin to get bored, and zap themselves back to the present, only to see a distorted version of Earth completely conquered by Evil Captain Underpants. They decide that only one person can save them now---Captain Underpants! They zap back to the first book of the series to order a second 3D Hypno-Ring. They also decide to take their past selves with them after they hypnotize Mr. Krupp and defeat Dr. Diaper, unaware of the consequences. After that, they attempt to zap back (or forward) to the third book, where they steal some Super Power Juice, along with their other past selves. After they do this, they return to the present (again,) where they are apprehended by an even worse version of Earth, now not only conquered by Evil Captain Underpants, but overrun by Talking Toilets and Giant Evil Zombie Nerds, due to Captain Underpants not being there to fight the Talking Toilets in Book 2 and Zorx, Klax, and Jennifer in Book 3. The three Georges and three Harolds run to their house, where they find Yesterday George and Yesterday Harold. Now, the four Georges and four Harolds run to Mr. Krupp's now destroyed house, where they have to use his household objects to fight off a Talking Toilet who ate Mr. Krupp. Once they do that, they recover Mr. Krupp, hypnotize him, and feed him the Super Power Juice. Captain Underpants is back!

So, the four Georges and Harolds venture with Good Captain Underpants to Evil Captain Underpants. Good Captain Underpants momentarily battles his evil self, but he is ultimately crushed and eaten by a zombie nerd. Helpless, the original George and Harold decide to zap back to exactly before that moment. Evil Captain Underpants and Good Captain Underpants fight once again, but this time, Good CU is victorious. Evil CU decides to find a way to eradicate Good CU so he can go back to absolute power. He apprehends his assistant, Melvin Sneedly. He explains that simply pouring water on him can restore him to just a helpless, grumpy principal. He then proceeds to shoot water from his upgraded Robo-Squid suit. George and Harold retaliate by shooting water back. They then realize the Robo-Squid can be used for far more than time travel. They begin to shoot heat-seekig missiles at Melvin's Super-Soldier-Squid suit. He is temporarily downed. George and Harold are boosted up by their past selves and flung upward to Evil CU. They latch on to his leg, and spray him with water.

This will be continued later.