No, a pile of newspapers is typically called a stack or pile, not a bundle. Bundles are usually groups of newspapers that are wrapped or tied together for distribution.
A bundle
In the noun phrase 'a pile of newspapers', the noun 'pile' is functioning as a collective noun for the 'newspapers'.
The idioms "make a pile" or "make a bundle" both mean the same and that is "make lots of money" (I.e. a pile or bundle of stashes/wods of cash).
ream, stack, pile
Recycling newspapers helps save trees. How high does a pile of newspapers have to be save an average tree?
Stack or bundle or heep
The official collective noun for journalists is a "scoop of journalists"
Yes, the noun 'pile' is a collective noun, it can be used as a general collective noun and is often used for a pile of trash, a pile of laundry, a pile of newspapers, etc.
packagebunch, group, collection, mass, pile, stack, heap, batch
Yes, "bundle of books" is correct. It can refer to a group of books that are sold or grouped together as a set.
Yes a pile of books is correct, you can also have a stack of books or a bundle of books
a bundle