Videos
Watch some great videos of talks about alternative voting methods and how they can solve vote splitting and other problems of choose-one Plurality Voting, from Veritasium, CGP Grey, and Mark Frohnmayer of Equal.vote.
Articles
The Center for Range Voting contains a wealth of articles about voting methods:
https://www.rangevoting.org
Books about Voting
Honeybee Democracy, by Prof. Thomas Seeley
Gaming the Vote, by William Poundstone
Approval Voting, by Prof. Steven Brams
Books about Activism
Swarmwise, by Rick Falkvinge
The Cathedral and the Bazaar, by Eric S. Raymond
The Art of Community: Building the New Age of Participation, by Jono Bacon