Once you let me know which author or specific book title you have in mind, I can point you toward the right or public domains where you might find them for free or at a low cost.
It sounds like you're looking for a guide on how to download books by , but the request is a bit broad because there are several prominent figures with that name.
: Often associated with specialized or instructional books.
To give you the most helpful guide, could you clarify which you are interested in?
: An author known for technical or academic literature.
: The former Russian intelligence officer.