I just finished the top two books, and am getting ready to start the bottom one. There are two others in the series. The author, Mark Berent spent 5 years in SE Asia flying F-100 and F-4 jet fighters and other aircraft. He even earned Cambodian Air Force wings, and did sneaky stuff with Special Forces. You get the idea that most of what he writes about really happened. His story continues from one book to the other, and is riveting.
The first book is a free Kindle book; the others are $3.99 downloads.