I will go ahead and answer some questions that came up in the comments.
Cheka are the eyes grumpy, not generally but if they have been thrown a lot are given to complaint.
Maggot no they were not really made for his defence except maybe as a last resort, so why did he make them of petrification only he knows for sure.
Valadaar yes they are thrown or dropped weapons though they have a tendency to complain about it. Go to Comment
Ok interesting and good idea. As someone who plays book type characters alot i can see how this would be useful but having the book destroyed very bad. It would likely take a very good enchantment to do as the bookmark would have to remember every thing in the book what the book looked like and whatnot. However if the contents of the book seemed to change such as what Echo said or the book being transported back to where it was supposed to be, who ever heard of someone sitting in the wizards study for a peek at a spellbook, or make it so that the book simply couldn't be opened by anyone else and told the owner of the bookmark where the book was. Go to Comment