No need, I got it to work as intended. I couldn't be happier 
The last thing I might need some quick advice, then I am going to leave you guys be for hopefully a little while. Seriously, thank you for all your help!
Now, my NextPage-button works like it should except for the fact that it doesn't disappear automatically once the book reaches the last page (presumably because it lies under the 'On Click-function'). Instead, it disappears when clicked one last time, which wouldn't be so bad if it wasn't for the fact that it screws up the scissors-button by making it reappear for some reason.
Is there a better place to put that line of code so that it disappears automatically? Currently the code for that button looks like this (and yes, putting the code for the visibility off the scissor-button in that specific function solved the issue I had earlier):
Code: ags

The last thing I might need some quick advice, then I am going to leave you guys be for hopefully a little while. Seriously, thank you for all your help!
Now, my NextPage-button works like it should except for the fact that it doesn't disappear automatically once the book reaches the last page (presumably because it lies under the 'On Click-function'). Instead, it disappears when clicked one last time, which wouldn't be so bad if it wasn't for the fact that it screws up the scissors-button by making it reappear for some reason.
Is there a better place to put that line of code so that it disappears automatically? Currently the code for that button looks like this (and yes, putting the code for the visibility off the scissor-button in that specific function solved the issue I had earlier):
function bNextPage_OnClick(GUIControl *control, MouseButton button)//Changes page forward//
{
if (gJournal.BackgroundGraphic < 52) gJournal.BackgroundGraphic ++;
else bNextPage.Visible = false;
if (gJournal.BackgroundGraphic == 52)bScissors.Visible = true;
else bScissors.Visible = false;
}