Who doesn't like free stuff?
I just joined Tyndale Rewards, earn points towards free books and bibles! You can join too! It's kinda like MyPoints (which I love, and have earned many an Amazon gift card through them). Tyndale seems to be a less-frequent version of MyPoints, geared towards the Christian reader.
I joined today, spent about 10 minutes filling out surveys and posting links, and I have 85 points available to spend, and I think probably 50 more points pending verification.
Right now, there several books available in each category and everything seems to be under 100 points. Hopefully they'll be adding more free stuff soon!
Go join Tyndale Rewards!