Nikola Tesla Ebook Collection REedited (Silver Edition A.S.)

Why not a Gold Edition? Because there are no video and audio files in order to keepthe collection relative small.There are no peple presented here, who have written a lot of books, but they had failed in the praxis.
Most of the presented matetial is open available and was in PDF or has been converted to PDF. There are some books which are not open to free usage.Be aware of each copyrights.