Like Mastering Genealogical Documentation, this is a useful but frustrating "textbook". As for helpful information, it's very useful explaining a reasonably exhaustive search, analysis & correlation, and resolving conflict. The information on citation isn't bad, but read his Mastering Genealogical Documentation book instead. The chapter on writing a solidly reasoned argument leaves a lot to be desired. Granted, that topic could & should be the subject of an entire book by itself. Jones writes in his usual pedantic, wordy style that made it a lot harder for me to slog my way through.