Does the author know what they’re writing about? It is always a good idea to check who the authors of text books are. For example, if you are reading a book on TCP/IP by Douglas Comer, then you should find out who Douglas Comer is to see if he is a Continue Reading
ACM
Sources of Academic Papers
Many places to get papers on the Internet. Some run as businesses so charge registration fee or fee/paper. ITALICS, as referenced in the Research Activity, make no charge. IEEE and ACM make published material available for members.