Grover is more than a little nervous - after all, there's a MONSTER at the end of the book. So, he enacts all kinds of zaniness like gluing the pages together in order to keep (protect) YOU (not him!!) from the monster at the end of the book.
This is the only book I remember my dad reading to me - EVER. (Probably because I asked for it a million times!!) He would act the parts out and change his voice and I would roll on the floor with laughter. When it came to Grover's antics, my dad would pretend that the pages really *were* stuck together. He'd grunt and groan and s-l-o-w-l-y turn the pages.
I read it to my kids - my children and students alike - in the same manner. And you know what? Everyone rolls on the floor giggling. Everyone has a good time.
I highly recommend this one - it is a great story about the wacky ways we devise to avoid what we think we fear. BUT, it is also a great way to build memories that will last forever with your children.