I purchased several books in the Laura Ingalls Wilder Family Series while visiting the Laura Ingalls Wilder Rocky Ridge Farm in Mansfield, Missouri, in early June, 2016.The Story of the Wilders, the second in the series, was the first one I read.
Almanzo Wilder was the subject of Laura Ingalls Wilder's novel Farmer Boy and also her husband. The book describes the lives of the actual Wilders from when they lived in Malone, New York, through their travels west. In addition to containing information about Almanzo, it also talks about his life outside of Farmer Boy, his siblings, and his parents. To the average reader, The Story of the Wilders may be a bit boring, reading like a textbook. To huge LIW fans like me and self-proclaimed "bonnet heads," it will be fascinating.
The book definitely has a specific target reader, of which I belong. It is a short book, so due to that and my interest, on a can't-put-it-down-scale of one for I couldn't even finish it to ten for I was up until the wee morning hours, I give it a nine.
Source: Anderson, William. (1973). The Story of the Wilders.