Shelton, Crystalynn: - Crystalynn Shelton is the published author of the Amazon Bestseller Mastering QuickBooks 2020. She has a degree in accounting from the University of Texas, Arlington, and has been featured by Travel Wire News, CorpNet blog, Merchant Maverick, Xero, and American Express. Crystalynn has been a licensed CPA for 10 years and an Advanced Certified QuickBooks ProAdvisor for 13 years. She has managed accounting teams at Fortune 500 companies such as Texaco and Paramount Pictures. She ran her own bookkeeping practice for 3 years and worked for Intuit (QuickBooks) for 3 years as a senior learning specialist.