You could simply let them keep the book. When they attempt to use the book (which would have infinite uses), it would check the number of unassigned skill points, as long as they have one unassigned it would reduce them by 1, then give the item. If they don't have any unassigned, nothing would happen.
It sounds simpler indeed but maybe harder for a novice like me.
No. You can get and set the number of unassigned ability points, but there is no event that tells you when it changes.
Any official word on this? Function name?
