Book excerpt: Muhammad Iqbal (d.1938), thinker and philosopher - poet of Indo-Pakistani sub-continent was one of the key architects of contemporary Islam. Through the medium of his thoughtful writing and soul-transforming poetry, both Urdu and Persian, he infused a new spirit in the Muslims, not only of India and Pakistan but also Iran, Afghanistan, Central Asia and the Middle East. He challenged the western concept of nationalism and expounded the concept of Islamic nations, on which the idea of Pakistan is based. A Treasury of Iqbal is a glimpse of his thought and contribution.