Visit this site to download PDFs of books by Gene Sharp and others focusing on strategic nonviolent action. Includes full downloads of How Nonviolent Struggle Works, From Dictatorship to Democracy, and others.
The Albert Einstein Institution is a nonprofit organization founded by Dr. Gene Sharp in 1983 to advance the study and use of strategic nonviolent action in conflicts throughout the world. (description from website)
Gene Sharp was the principal founder of the Albert Einstein Institution, and the Swarthmore College Peace Collection serves as the repository for the records of this organization. Take a look at the finding aid to get a sense for what kinds of documents are included in this collection.
Contact Peace Collection Curator Wendy Chmielewski (wchmiel1) if you're interested in viewing any of these materials. Note that access to some is restricted (which is a common practice when participants in an organization are still alive), so accessing them will require permission.
ICNC has archived all of their news digests using Diigo. You can easily search these archives for a topic of interest.
There are some broken links in the news archive, but you can often use the Wayback Machine to view the article as it was originally posted years ago. Just copy and paste the URL from Diigo into the Wayback Machine search box, and click Browse Archive.