There are over 800 secondary works on Iqbal. Below we have included a selection of those:
Abbas, Syed Ghulam, Dr. Muhammad Iqbal: The Humanist: A Reassesment of the Poetry and Personality of the Poet-Philosopher of the East (Lahore: Iqbal Academy, 1997)
Ahmad, Absar, Concept of Self and Self-Identity in Contemporary Philosophy: An Affirmation of Iqbal's Doctrine (Lahore: Iqbal Academy Pakistan, 1986)
Ahmad, Aziz, Islamic Modernism in India and Pakistan, 1857-1964 (London: Oxford University Press, 1967)
Ahmad, Doris, Iqbal as I Knew Him (Lahore: Iqbal Academy Pakistan, 1986)
Ahmad, S. Aasan, Iqbal: His Political Ideas at the Crossroads: A Commentary on Unpublished Letters to Professor Thompson with Photographic Reproductions of the Original Letters (Aligarh: Print vol Publications, 1979)
Ahsan, A. Shakoor, An Appeciation of Iqbal's Thought and Art (Lahore: Research Society of Pakistan, University of the Punjab, 1985)
Ali, Parveen Shaukat, The Political Philosophy of Iqbal (Lahore: Publishers United, 1970)
Aqeel, Moinuddin, Iqbal: From Finite to Infinite: Evolution of the Concept of Islamic Nationalism in India
(Karachi: Abul Kalam Azad Research Instititute, 1986)
Ashraf, S. E., A Critical Exposition of Iqbal's Philosophy (Patna: Associated Book Agency, 1978)
Azad, Jagan Nath, Iqbal: His Poetry and Philosophy (Mysore: Prasaranga, 1981)
Bilgrami, Hamid Hasan, Glimpses of Iqbal's Mind and Thought: Brief Lectures on Iqbal Delivered at London, Cambridge and Oxford (Lahore: Orientalia, 1954)
Biswas, Lakshmi, Tagore and Iqbal: A Study in Philosophical Perspective (Delhi: Capital Publishing House, 1991)
Burney, Sayed Muzaffar Husain, Iqbal and National Integration (Chandigarh: Haryana Sahitya Akademi, 1986)
Chaghatai, Muhammad Ikram, Iqbal and Goethe (Lahore: Iqbal Academy Pakistan, 2000)
Cughtai, Muhammad Ikram, Goethe, Iqbal and the Orient (Lahore: Iqbal Academy Pakistan, 1999)
Dar, Bashir Ahmad, A Study in Iqbal's Philosophy (Lahore: Ghulam Ali and Sons, 1971)
Dhawan, Madan Lal, Iqbal and His Equals (Delhi: Bhavna Prakashan, 1986)
Enver, Ishrat Hasan, The Metaphysics of Iqbal (Lahore: Muhammad Ashraf, 1944)
Ghani, Abdul, The English Translations of Iqbal's Poetry: A Critical and Evaluative Study (Lahore: Bazm-i Iqbal, 2004)
Gibb, H. A. R., 'Iqbal, Sir Muhammad (1877-1938)', rev. Francis Robinson, Oxford Dictionary of National Biography (Oxford: Oxford University Press, 2004) [http://www.oxforddnb.com/view/article/34108]
Grover, Verinder, Mohammad Iqbal: A Biography of His Vision and Ideas (New Delhi: Deep & Deep, 1998)
Hamid, Muhammad, The Poet Philosopher of Fifteenth Century Hijrah (Lahore: Sang-e-Meel Publications, 1980)
Haq, Q. M., and Waley, M. I., Allama Sir Muhammad Iqbal: Poet-Philosopher of the East (London: British Museum Publications Ltd for the British Library, 1977)
Hasan, Masudul, Life of Iqbal: General Account of His life (Lahore: Ferozsons, 1978)
Hasan, Mohammad, A New Approach to Iqbal (New Delhi: Publications Division, Ministry of Information and Broadcasting, Government of India, 1987)
Hassan, Parveen Feroze, The Political Philosophy of Iqbal (Lahore: Publishers United, 1970)
Hassan, Riffat, The Sword and the Sceptre: A Collection of Writings on Iqbal, Dealing Mainly with his Life and Political Works (Lahore: Iqbal Academy Pakistan, 1977)
Iqbal, Javid, Stray Reflections: Allama Iqbal's Note-Book (Lahore: Iqbal Academy, 1992)
Iqbal, Saeeda, Islamic Rationalism in the Subcontinent: With Special Refernce to Shah Waliullah, Sayyid Ahmad Khan and Allama Muhammad Iqbal (Lahore: Islamic Book Service, 1984)
Jawed, Mohammad Aslam, The Unknown Iqbal (New Delhi: Kitab Publishing House, 1996)
Kazmi, Syed Latif Hussain, Philosophy of Iqbal: Iqbal and Existentialism (New Delhi: A. P. H., 1997)
Khan, Asif Iqbal, Some Aspects of Iqbal's Thought (Lahore: Islamic Book Service, 1977)
Khan, Zulfiqar Ali, A Voice from the East: The Poetry of Iqbal (Lahore: Mercantile Electric Press, 1922)
Khanum, Sajida Adeeb, Iqbal as a Philosopher (Hyderabad: Abul Kalam Azad Oriental Research Institute, 1982)
Khatana, Manzoor H., Iqbal and Foundations of Pakistani Nationalism, 1857-1947 (Lahore: Book Traders, 1992)
Majeed, Javed, Autobiography, Travel and Postnational Identity: Gandhi, Nehru and Iqbal (Basingstoke: Palgrave Macmillan, 2007)
Majeed, Javed, Iqbal: Islam and Postcolonialism in South Asia (London: Taylor & Francis, 2007)
Malik, Ghulam Rasool, Iqbal and the English Romantics (New Delhi: Atlantic Publishers and Distributors, 1988)
Malik, Hafeez, Iqbal: Poet-Philosopher of Pakistan (New York; London: Columbia University Press, 1971)
Malik, Nadeem Shafiq, The Political Segacity of Iqbal (Islamabad: National Book Foundation, 1998)
Malik, Rashida, Iqbal: The Spiritual Father of Pakistan (Lahore: Sang-e-Meel Publications, 2003)
Maruf, Mohammed, Iqbal and His Contemporary Western Religious Thought (Lahore: Iqbal Academy Pakistan, 1987)
May, Lini S., Iqbal: His Life and Times, 1877-1938 (Lahore: Ashraf, 1974)
Mir, Mustansir, Iqbal: Makers of Islamic Civilization (London: I. B. Tauris, 2005)
Mujadir, Sharif, Allama Iqbal: Poet-Philosopher of the East (Karachi: Quaid-i-Azam Academy, 1986)
Munawwar, Muhammad, Iqbal: Poet-Philosopher of Islam (Lahore: Islamic Book Foundation, 1982)
Naim, C. M., Iqbal, Jinnah and Pakistan: The Vision and the Reality (Lahore: Vanguard Books, 1984)
Popp, Stephan, Muhammad Iqbal's Romanticism of Power: A Post-Structural Approach to his Persian Lyrical Poetry (Wiesbaden: Reichert, 2004)
Qaiser, Nazir, Iqbal and the Western Philosophers: A Comparative Study (Lahore: Iqbal Academy Pakistan, 2001)
Rafique, M., Sri Aurobindo and Iqbal: A Comparative Study of Their Philosophy (Aligarh: Alogarh Muslim University, 1974)
Rahim, Khawaja Abdur, Iqbal: The Poet of Tomorrow (Lahore: Ferozsons, 1968)
Rahman, Mujibur, Iqbal: The Great Poet Philosopher of the Muslim World (Lahore: Iqbal Academy Pakistan, 2004)
Raina, Chaman Lal, Iqbal and the Indian Heritage (Srinagar: Iqbal Institute, University of Kashmir, 1988)
Raja, Tasadduq Husain, and Siddique, Qazi Muhammad, Iqbal: A Cosmopolitan Poet (Lahore: Iqbal Academy Pakistan, 1996)
Rashis, Khwaja Abdur, Iqbal, Quran and the Western World (Lahore: Progressive Books, 1978)
Rastogi, Tara Charan, Western Influence in Iqbal (New Delhi: Ashish Publ. House, 1987)
Rehman, S. A., andBrohi, A. K., Iqbal and Socialism (Karachi: Hamdard National Foundation, 1974)
Saiyidain, Khwaja Ghulam, Iqbal's Educational Philosophy (Lahore: Arafat Publications, 1938)
Schimmel, Annemarie, Gabriel's Wing: A Study into the Religious Ideas of Sir Muhammad Iqbal (Leiden: E. J. Brill, 1963)
Siddiqi, Mazheruddin, The Image of the West in Iqbal (Lahore: Bazm-i-Iqbal, 1956)
Siddiqi, Nazir, Iqbal and Radhakrishnan: A Comparative Study (New Delhi: Sterling Publishers, 1989)
Singh, Iqbal, The Ardent Pilgrim: An Introduction to the Life and Work of Muhammad Iqbal (London: Longmans, 1951)
Singh, Khushwant, Shikwa and Jawab-i-Shikwa: Complaint and Answer: Iqbal's Dialogue with Allah (Delhi: Oxford University Press, 1981)
Sinha, Sachchidananda, Iqbal: The Poet and His Message (Allahabad: Ram Narain Lal, 1947)
Taseer, Muhammad Din, Iqbal: The Universal Poet (Lahore: Munib, 1977)
Vahid, Syed Abdul, Glimpses of Iqbal (Karachi: Iqbal Academy Pakistan, 1974)
Waheeduddin, Faqir Syed, Iqbal in Pictures: A Pictorial Biography of the Famous Poet (Karachi: Lion Art Press, 1965)
Zakaria, Rafiq, Iqbal: The Poet and the Politician (New Delhi: Viking, 1993)