Cob: owner buillt home or owner built home?

[Jonathon & Miki'ala (Tiffany)]

I want to buy the Ken Kern Book "The Owner Built Home" that Ianto refers to.
I am not sure which one to get.  When I went to Amazon Books, I found two;
one $53 and the other $5,  What the difference? Same title,obviously not the
same book.  If anyone knows I would greatly appreciate the tip.

Jonathon