The book contains mainly the history of the sheikhs of the city of Kasan (in Ferghana). Majmu at-tawarikh is a semi-historical-semi-legendary work in which historical facts and dates are intertwined with legends and fiction. But it was in connection with the similar nature of this work that, along with various Kipchak and Kyrgyz traditions of Fergana and Tien Shan, several episodes of the Kyrgyz epic Manas were recorded in it, giving researchers very valuable material to study the history of this epic. Majmu at-tavar also contains a lot of interesting information on the ethnography of Kyrgyz and other Turkic tribes. The main plot outline of the work is the biographies of the Kasan and Schirkent sheikhs, in connection with which the events of military history, reports on Kyrgyz tribes, traditions, etc. are set out.