Zcash is a new form of private money that is controlled by no one and is developed as an open collaborative project. Below are some curated educational resources to get you jump started at unerstanding the system.
Note that this list is open source; please suggest changes on Gitlab!
Zerocash: Decentralized Anonymous Payments from Bitcoin (extended version, 2014)
Zkp.science (extensive list of zero knowledge proof research papers)