Well, I think it is an object but if you view it as a weapon, you could summon a book for combat purposes

That the thing i am wondering if it the power that determins that or is it the person who wields the power who determins it. So powers have rules and limits so will it restrict you if you think of summoning something like the book of vishanti? Will you end up getting chaos blades instead?

Well it's a 50/50 chance.

But if you get strong enough, you might be able to control it

It's magic, anything can be a weapon.

Any object can be a weapon, and every weapon is an object.

Which means any object in general is or can be a weapon

Mostly it is object.

Knowledge is difinetly weapon.