After reading the cherry pie recipe -- and instructions for high-altitude cooking, I saw links mentioning that Charles Darwin had the same trouble with cooking at different altitudes and wrote about them in The Voyage of The Beagle. This sent me to Amazon, which decided I could have that book for free because it's old and, hey, sometimes she buys two others when we give her one free.

I must remember to click over to Amazon anytime I run across a title of a book I always meant to get but didn't, especially old titles. I'm not sure whether it's my Prime membership or just the number of books I buy.

I'm certain that others will find different free books offered to them, based on their individual activity online.

This always bugged me about Amazon -- the fact that they offer the same item at different prices to different people. However, now I'm determined to find some free ones if they're going to dangle them in front of me.
*** If you feel like it, I'd appreciate hearing what free books you were offered lately by Amazon. I'm very curious about their methods.