Cactus Game Design Message Boards

http://landofredemption.com/?page_id=2741

That link has the 4th edition rulebook right at the top and then the next thing underneath is the Redemption Exegesis Guide (REG) which. The Official Redemption Dictionary of Identifiers and References (ORDIR) is next. Those 3 documents will tell you everything there is to know. Feel free to ask questions here or on the Redemption Discord channel.

Where can I find the current rules for the game?  Picked up a few of the new Israel's Deliverance starter decks but they didn't come with a rule book.  I remember the basics of the game but I'm not familiar with "Reserve" etc.

Here too:
https://www.cactusgamedesign.com/downloads/