There are many places to find the books Fascinating Womanhood, All About Raising Children, and The Fascinating Girl. There is a link to the order form at the official Fascinating Womanhood site, on the left-hand side of the page.
All three books can be found on Amazon.com, although All About Raising Children is not at a reasonable price on this site, so the official Fascinating Womanhood site is the place to go for that book. Barnes and Noble has the three books at similar prices to Amazon.
I also found Fascinating Womanhood at a thrift store years ago.