There is one more book in this series titled "What Do You Say After You Say Hello?" by Dr. Eric Berne. I read this book long before. I hope you guys would also love to read this title. Following "I'm OK, You Are OK," another title, namely "Staying OK," was released, which had more practical 'what to do?' ideas straightforwardly dealt with than "I'm OK, You Are OK." As Mr. P.K. Acharya said, these books are available at a very low price from footpath book stores in major cities. These are really interesting titles in TA.
Thanks & Regards,
A. Kalaivanan.