While I have no doubts how good the author and his friends are, all of their ideas were quite intuitive and simple to understand.
The kind of "I could've come with the same idea" type. Realistically I would've not for many reasons but it is still stuff I can grasp and even gives me ideas while reading.
Which is different from the general hacker idea I have of someone in a basement exploiting extremely far fetched and hard to grasp for me memory corruptions in some cache dumping some random bytes like the very complex attacks like Spectre I've read about.
It also makes me think that if most of the applications I have worked on haven't been attacked and easily exploited is because honestly nobody bothered.