It has always been my opinion that the most valuable tool man has is the written word, whether writing it himself or reading the views of others. The subject of electronics is no exception. Electronics books are not always expensive to obtain. Of course, the cheapest way to obtain what you re looking for is to borrow them from your local library. I have found countless electronic books at our five local libraries, some that I have not been able to find anywhere else.
University libraries are even better.
In addition to disposing of old stock, many of those sales feature books and magazines that were donated to the library specifically for resale. Keep an eye out for other older electronics and science books as they are sometime more useful than current popular texts. Another source for books is your local college or university. I ve made friends with the staff at the electrical engineering department, and they have been more than willing to lend me any books I needed to aid in my self-studies. Magazines like Popular Electronics are still my favorite source of information.