This story about the first 20 years of Mikhail Portnov's life in the US. Mikhail is a founder of the first QA school in Silicon Valley. Twenty years ago Mikhail Portnov School had just begun. It was not easy, but Michael never deviating , and sow " reasonable, good , eternal ." The school has grown and matured . Thousands of graduates of schools of Mikhail Portnov successfully adapted in Silicon Valley and some of them have themselves become teachers .

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ThriftBooks is a fully independent seller of used books, having sold more than 160 million used and new books since we started in 2003. Each quality used book is sorted, graded, shelved and shipped by hand by our team of dedicated employees in our seven warehouses across the US. We have the best selection of books, in the right condition and format, at everyday low prices. We also have a dedicated, US-based Customer Service team, ranked in the top three by Newsweek for Best Customer Service in 2018 and 2019, so you can shop with confidence. We support and invest in our employees, appreciate and value our customers, and truly believe in the power of the written word to educate, energize, and engage readers of all ages and interests.

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