The following book is a good beginners' book in doing genealogy:
How to Do Everything Genealogy (4th edition), by George G. Morgan, published in 2015 by McGraw-Hill Education. This book is available to USF patrons via UBorrow.
Once the researcher has understood the basic process, additional books that cover how to do research for specific ethnic groups (such as English, Scottish, Irish, German, Italian, Hispanic, Scandinavian, Jewish, African American, or Native American) will be useful.