In Goosebumps (2015) movie, we can see that
R.L. Stine writes another story that all the monsters he released will get trapped in a book, which he presumed to happen as all things happen when written with the typewriter. But when the book started to absorb all the monsters he created, it started to pull Hannah too. I understand that Hannah is also created by R.L. Stine and not naturally human.
But why did he mention in his book that Hannah will get trapped too? Can't he just mention the other monsters without Hannah and complete the book?