First, already +8str is gamebreaking. Then there's books. And I'm telling you, in the long games, you get most of these random accessory items. If you want to set a limit to say 5 or 6 items, then you won't see the limit in your short games. But I get 25 items in one inventory and I equip most. And that turns a strong character into an ubergod.
How are you getting so many items.. I play on epic and rarely see that many in a full game..
Edit: I'm guessing you jack up the number of quests etc in your games.
+8 is not game breaking at all.. espcially in the late game.
Books are 1 time use items. If your equipping them then they are bugged.
Also there are only 4 Acessories that increase the str stat. A Book those 2 rings Plus a potion which gives a +.
So the max you can get in + to str due to accessories is actually 11. From equipable accessories the max is 8.