I'm OK-You're OK
By Thomas Harris

Complete Ebook, originally in PDF format, converted using Calibre to MOBI and EPUB.

If you can't be bothered to search Google for this book, here is the Wikipedia description

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Description:
I'm OK, You're OK by Thomas Anthony Harris is one of the best selling self-help books ever published. It is a practical guide to Transactional Analysis as a method for solving problems in life. From its first publication during 1969, the popularity of I'm OK, You're OK gradually increased until, during 1972, its name made the New York Times Best Seller list and remained there for almost two years. It is estimated by the publisher to have sold over 15 million copies to date[2] and to have been translated into over a dozen languages.[3]