The book gives detailed instructions on using the Ancestral File, the International Genealogical Index, and the U.S. Social Security Death Index. It first explains the characteristics common to all the files.
Ancestral File [is] a database of [35 million] names of linked people...created from submissions of Mormon and non-Mormon, who have done family history research. ...the church does not confirm that the information is correct. [Users] should verify the information.
The IGI is an index of over  million names of deceased persons. Records are either parish extractions [where] certain years from a parish have been entered into the computer, or have been submitted by LDS members....Women may appear under their married names [usually maiden surname]...
I found this to be a very helpful book, not only for the detailed instructions on using FamilySearch, but also for the additional background information and strategy suggestions ... END -- Genealogical Computing, reviewed by Donna Prezcha, July/August/September 1993
This textbook is by the author of the series of articles on the 1992 edition of the IGI currently appearing the Genealogists' Magazine and extends the instruction to FamilySearch, a set of genealogical computer programs and data files produced by The Church of Jesus Christ of Latterday Saints... In addition to the IGI, FamilySearch includes the L.D.S. Ancestral File, a pedigreelinked file for sharing genealogies and hte U.S. Social Security death Index 1962. ... Records can be 'downloaded' by anybody from these files on to an ordinary diskette...
Although not an official L.D.S. publication, this book is written in the jargonfree language that only Mormon computer specialists seem to be able to use, and there are sixty illustrations of what one can expect to see on the screen as one uses FamilySearch. -- Frank Leeson in the Genealogists' Magazine: Journal of the Society of Genealogists, London, England, vol. 24:7, September 1993, page 710.