1. make a stool sprite
2. make the character
3. make "character standing on the stool" sprite
4. make the event to progress like this:
a. place the event with stool sprite as it is grapich
b. set the trigger to be "push by button (or something)"
c. make your "controllable character" goes transparent and change the stool event grapich to no.3 (add some sound effect)
d. place "wait" for the timing of process (character stand on the stool and search a book)
e. process done, revert the c process
more or less like that, send the screenshot how your event process in here if you still dont understand. Other ppl will try to help too
Even though I spent 100's of dollars on my game already. I think I might just have to give it away for free. Since I haven't heard back from people if I could use some of their graphics. Even from a global mod here. Maybe I can make a donation thing.