The 6th book of the series entitled "Sara (Saray) Khatun" was published by Khazar University Publishing House. The authors of the book are professors Hamlet Isakhanli and Shahin Fazil.

The book is dedicated to Sara (Saray) Khatun, the first female diplomat of Azerbaijan. Her diplomatic mission regarding the Aq Qoyunlu and Qara Qoyunlu, her meeting with the Ottoman ruler Sultan Mehmed Fatih and achieving peace, as well as her diplomatic efforts regarding the Mamluks, Timurids, and Venice are noted.

Along with many photographs, the book includes images of Sara (Saray) Khatun by Azerbaijani artists (People's artist Altay Hajiyev and artist Jamaladdin Ismayilov).

This book of the series was also presented to the readers in an elegant way.