Yes, the best book on this is Yasha Levine - Surveillance Valley . You can find the audiobook on torrents.

The purpose the the very first DoD networks, was as an anti-communist counter-insurgency tool, mainly to aid in the collection of data and the fight against communists in SE asia, particularly Vietnam.

No, because it is not true. The Internet started as an idea for decentralized communications that the military could use in case of nuclear war. Then DARPA got the universities involved and it became a way to connect all the uni networks, which the unis used to share research when we were not being nuked.

Edit: When the internet first started to appear, there just wasn't enough bandwidth to engage in surveillance, even after the uni's got involved. No one anticipated it exploding into everyone's household. Surveillance got tacked on later.

There was an old episode of TrueAnon about the links between Epstein (and the CIA) to MIT that went over some of this stuff. I'm sure there's probably a book or article about it somewhere, but I don't have any better citation at the moment.