Please summarize this work.

Originally published in 2002, The Oxford Illustrated History of Christianity recounts the origin and history of Christianity across the world, with its first nine chapters focusing on Christianity before 1800 and the subsequent chapters covering Christianity after 1800. It balances treatments of Roman Catholicism, Protestantism, and Orthodox Christianity with discussions of the relationship of Christianity to Islam and the impact of the Enlightenment. It is written from the neutral, historical perspective advocated by most scholars in the field rather than displaying strong sectarian prejudices, deliberately remaining neutral on the respective truth claims of Christianity and other religions and the claims of particular Christian denominations. As any responsible historical work, it presents historical evidence of how people have thought or believed in the past, leaving readers to work out their own belief systems.