Weird bug for sure. But seems to be a problem with this item not having a hitbox.
Just to explain:
* I can rightclick and press "Drop" and the book will be dropped on the ground right where I stand.
* I can press ALT and see the name of the skill book, and pick it up.
* I can not target it normally and move it when it's on the ground. It doesn't show a hitbox the way any other skill book does.
* Because I can not target it I can also not move it.
* If I drag it out of the inventory, game will freeze and crash.
* Game crashes the moment this book leaves the inventory screen and goes from being an inventory icon to a 3d model. (At least this is what I'm assuming is happening)