Ware's book is highly respected and frequently recommended introduction to Orthodoxy for the lay reader. Ware, now Bishop Kallistos, converted from Anglicanism and is a supporter of Orthodox ecumenical efforts. The Amazon reviews give two diametrically-opposed opinions. One reviewer, apparently not Orthodox, loves it. Anglican-Orthodox Pilgrimage edited by Franklin Billerbeck.
Personal conversion accounts.
Are Becoming Orthodox edited by Peter E. Gillquist. The Greek East and the Latin West by Philip Sherrard. Focuses on Buddhism, Islam and Judaism. For a review by Donald W. Mitchell see the newsletter of Monastic Interreligious Dialogue . Alexander the Great on the Web .