Did you try putting wax paper between the pages? I had that problem at first to. If you prop the book open to dry completely then put wax paper between the pages, it should be ok. It is also ideal to store your altered books this way too incase they are expose to warm temperatures. If you decide to display them, you can remove the wax paper. Modge podge in my opinion is THE best sealer out there for any type of art work.