Can Arcane Lock 5e dnd uses be applied to backpacks or books?

Arcane Lock 5e dnd uses

Your DM can decide upon that whether Arcane Lock 5e dnd uses be applied to objects such as backpacks or books. It doesn’t matter if it works for a lock-bound book (like a modern diary) or a book that does not have such a locking mechanism. I don’t know what to rule on that based on the examples provided by the spell.

The spell reads (PHB, page 215): A closed door, window, or gate is a way to enter.

These are usually things with locks or can. A book can be locked (i.e., The locked diary), then the question is, “Does Arcane Lock Lock Things That Can Have Locks on But Don’t?”

The spell also states:
This spell makes it more difficult for the object to be broken or forced open. The DC to pick it up or break any locks increases by 10.

It states “to pick or break any locks on it.” That suggests that the objects should be locked, as this seems to have been written with a locked door in view. These are the main routes to bypass a locked door. This interpretation could lead a DM to rule that you can cast an arcane lock onto a book with a lock on it but not on a book without a lock.

The fact that it says “or” could also be understood to mean “if it’s locked, you can pick it, but if it’s not, you have to break it.” That means that any door, window, or other object is a valid target for arcane locks. What stops this spell from targeting any object, then? We already have an inconsistent list that includes “chest or another entryway.

We’re left with the “up to DM” option. If the DM allowed it, anyone who wants to view your arcane-locked books would need to pick it or open it (with great difficulty). It would apply to any item that the DM ruled valid (backpacks etc.).

How to beat an arcane lock in d&d?
For 10 minutes, knocking on an object will disable arcane locks. The object becomes more difficult to open or break while it is affected by this spell. In addition, the DC to pick it up or break any locks it has increases by 10.