Questia School is an online library and research tool with thousands of eBooks, academic journal articles, magazines, newspapers and encyclopedia entries. Ask your friendly librarian for logon details.
The Christopher Brennan Library has many suitable books for this unit of work under 950.21 in the information collection.
The Mongols by 
Daily Life in the Mongol Empire by "[A] general history book that uses primary source material throughout. It introduces students to the importance of primary sources and stresses how these early texts provide the evidence and foundations for all the words, ideas, and thoughts that make up traditional history books. The excellent biographies, including one listing many of the translated primary source materials, ensure that this book will be an essential component in any library of the Mongol Empire." -- Bulletin of the School of Oriental and African Studies
Genghis Khan and the Mongol Empire by Genghis Khan was a warrior and ruler of genius who, in the late twelfth and early thirteenth centuries, brought the nomadic tribes of Mongolia together under his rule and then turned his attention beyond his borders. This volume chronicles the history of the ancient people of the steppes, the rise of Genghis Khan and reforms under his rule, his conquests in northern China and Western Asia, and the history of the Mongol people after Genghis Khan.
Genghis Khan and the Making of the Modern World by 
China by 
Genghis Khan and the Mongol Conquests, 1190-1400 by 
Mongols by 
