Unsure re: Foreclosure

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I received an email from Realtytrac and noticed that my neighbor's (acquaintance only) address was listed. I tried going on the the county recorder's website to find out more info and it was not listed. But, when I was on the recorder's website, I started playing around a little and under "Lis Pendens" it showed a home of another neighbor. I am all new to this and am just trying to figure/find out how can I obtain more info. on purchasing these homes.

Can someone please explain to me the whole process if you wouldn't mind???

Thanks in advance.