### About the book authors:

**Stuart Donnelly, PhD, **was awarded a PhD in mathematics from Oxford University. He has prepared students for the TASC test and GED Test for the past two decades.

**Stuart Donnelly, PhD,** earned his doctorate in mathe-matics from Oxford University at the age of 25. Since then, he has established successful tutoring services in both Hong Kong and the United States and is considered by leading educators to be one of the most experienced and qualified private tutors in the country.

**Stuart Donnelly, PhD, **was awarded a PhD in mathematics from Oxford University. He has prepared students for the TASC test and GED Test for the past two decades.

**Stuart Donnelly, PhD, **was awarded a PhD in mathematics from Oxford University. He has prepared students for the TASC test and GED Test for the past two decades.

**Sandra Luna McCune, PhD,** is professor emeritus and a former Regents professor at Stephen F. Austin State University. She's now a full-time author. **Shannon Reed, MA, MFA,** is a visiting lecturer at the University of Pittsburgh, where she teaches composition, creative writing, and business writing.

**Stuart Donnelly, PhD, **was awarded a PhD in mathematics from Oxford University. He has prepared students for the TASC test and GED Test for the past two decades.