In 2004, Nicoll published a biography of the Mahdi of Sudan, "The Sword of the Prophet: The Mahdi of Sudan and the Death of General Gordon". His second book, a biography of the Mughal Emperor Shah Jahan, was published by Haus Publishing in April 2009 as "Shah Jahan: The Rise and Fall of the Mughal Emperor". Penguin-India (under the Viking imprint) published the same volume in September 2009. Returning to Sudan studies, Nicoll published "An Index to the Complete Works of al-Imam al-Mahdi" in June 2009. The Abd-al-Karim Mirghani Cultural Centre in Omdurman followed this with the publication of an Arabic translation of "The Mahdi of Sudan" in October 2009, under the title "Seif al-Nabi: Mahdi al-Sudan". In September 2010, the Qasim Data Centre in Khartoum published Nicoll's "Bibliography of the Mahdia". In April 2013, Pen &amp; Sword published his reappraisal of British policy in Sudan: "Gladstone, Gordon and the Sudan Wars, 1883-5: The Battle over Imperial Intervention in the Victorian Age". In July 2013, Durham University published his Luce Lecture as 'Da'irat al-Mahdi: Money, Faith and Politics in Sudan'. In late 2014, the Modestine Press in Milton Keynes published the first in a series of annotated editions of important primary sources relating to the Sudan wars: "A Cool, Equable Judgement: The Sudan Journal of Lt.-Col. J. Donald Hamill-Stewart". Nicoll's most recent peer-reviewed article is 'Fatwa and Propaganda: Contemporary Muslim Responses to the Sudanese Mahdiyya', published in "Islamic Africa" 7/2 (2016): 239-65. In 2017, the Modestine Press published the follow-up to the Stewart journal: "A Perfect Pandemonium: The Khartoum Journal of Major-General Charles Gordon". This is currently being translated into Arabic, again for the Abd-al-Karim Mirghani Cultural Centre. In 2018, Modestine produced Nicoll's third volume of primary sources: "Fully Equal to the Occasion: Frank Power and the Siege of Khartoum".