Cosmic Ray has highlighted the biggest issue with this, but it also doesn't make any sense in D&D to walk into a fight with your spell book in hand, because spell casters memories spells from spell books during a rest, and it takes many hours to do lol, they don't read from them on the fly to cast spells, it's not like pulling a trigger to shoot from a gun, they are also incredibly valuable for Wizards, and the thought of carrying them around would be horrifying, in case they got damaged or stolen. I'm not familiar with any setting in D&D where this makes sense, I know there are spell books that give characters bonuses for holding them, I don't really think this should be a thing, and they make me uneasy.