A London publisher asked Kitto to write up his travel journals for a series of articles in the Penny Magazine, a publication read at that time by a million people in Britain, reprinted in America and translated into French, German and Dutch.
Other writing projects followed as readers enquired about his experiences in the East amidst people living in circumstances closely resembling those of Bible times.
Kitto had been a careful observer of physical detail – the topography, the animals, architecture, agricultural methods, the manner of interaction between people.
He supplemented his own observations with details from the journals of other travellers, and helped the Bible reader to understand many things previously obscure or contradictory to the Western mind.
In his generation Dr Kitto was a most significant contributor to Christian scholarship, and he provided much help for Evangelicals defending the Bible against the attack of liberal critics.
He eventually wrote a total of twenty-three books, of which Charles Spurgeon considered the Daily Bible Illustrations to be "more interesting than any novel that was ever written, and as instructive as the heaviest theology."