The book description states very clearly what's included: "State by state, year by year, often county by county and district by district, she shows the researcher what is available in state census records, when it is available, and what one might expect to find in the way of data."
This is not a book of actual state censuses, which should be thouroughly obvious from the book description, the price, and the fact that it is only 116 pages. This is, instead, a finding aid to help researchers see what state census info may be available for their areas of interest. A resource like this is very valuable to genealogists and other researchers, who then know whether a census may be available through LDS or other libraries/archives.
