Jain literature is also of immense value for the restructurisation of ancient history of India. The most priceless work in Jain literature is 'Parisistha Parvana', written by Hema Chandra. Bhadrabhahu renders historical stuff about the rule of Chandra Gupta Maurya. Other works of historical importance include- 'Katha Kosh', 'Kalika Purna', 'Lok Vibhaga' etc. The chief religious book of Jams, known as 'Angas' and 'Upangas', also furnishes just about some historical material. Thus it can be seen that immense bulk of literature is available for the restructurisation of history of ancient India. As no work equivalent to works of Herodotus and Thucydides is found in the ancient period, uncounted complexities arise in restructuring the history of ancient India and placing the event in a sequential order. However, modern scholars have accomplished an admirable job, by drawing out historical materials from the immense bulk of ancient literature of India, which is primarily spiritual in character.