“Free Technology Ebooks from Packt Publishing.
Packt Publishing offers a free technology ebook a day. You can avail this here.
All you have to do is to visit that URL and claim you free book. Additionally after you add books in your account you can read it online, download PDF, EPUB and MOBI version and send to your Kindle.
In case you missed some of those cool ebooks, I have gathered some from my collection and will be updating regularly.
However this repository is exclusively for security folks and is a part of Hack with GitHub repository” Free Security eBooks?
Free Security eBooks-2?
PacktPub – Free learning
PacktPub Mapt personal library