As soon as you get to big nate island when you get down from the ballon. Walk to the Right side and you will be in front of the pop shop.
Klassic Komix is in the business district (left side of the island).
There are nine places where the puzzle pieces exist on Big Nate Island in Poptropica. These are the in the comic store, in the school, in the pop-in shop, on the phone pole, in the science lab, on the wood tower, in the photo shop, in the playground, and on the lighthouse.
On 'Big Nate Island' go past the photo shop and the playground and if you see a rock with 'Puffin Point' then you are there
The guy at the "Say Cheese" photo shop, who will swap you some scuba gear for it.
On Big Nate island, you have to go into the Komix Shop, and talk to the guy, then find all of the Big Nate comic pieces, assemble them, and give them to him. Then he'll give you gum. *Various kinds of "effects" using gum are also available in the Store, but do not have anything to do with Big Nate Island.
The island's Klassic Komix shop is on Main Street.
The comic guy is inside the comic shop.
the man in the comix shop will give you it when you complete the puzzle
The third piece is in the camera shop.
it is on the spy island.
The bookstore on poptropica is on Na boot island. Is that what you were looking for? Correct me if not.
After you get all of the pieces of the comic to the Comic Shop Owner, he will give you a pack of gum. Type in " Where do i get all of the comic peices in Big Nate Island?" To find them all. Hope this answer helps!