Complete A+ Guide to IT Hardware and Software: CompTIA A+ Exams 220-1101 & 220-1102 9th Edition is written by Cheryl A. Schmidt; Christopher Lee and published by Pearson IT Certification PTG. ISBNs for Complete A+ Guide to IT Hardware and Software are 9780137670673, 0137670672 and 9780137670444, 0137670443.