The success of The Guide to Science convinced Brewer that his readers still accepted religious explanations rather than evolutionary theory.[1] Following the publication of On the Origin of Species in 1859, Brewer wrote Theology in Science; or The Testimony of Science to the Wisdom and Goodness of God (published in 1860) in order to demonstrate that evolution had not destroyed theological tradition and to continue The Guide to Science's promotion of natural theology.[5] The book's popularity also resulted in Brewer being sent "a large number of questions on all imaginary matters".[2][32] These questions and their answers became the nucleus of Brewer's Dictionary of Phrase and Fable, first published in 1870.[9][32] This latter book has long outlived all of Brewer's other publications[33] and remains a classic reference work.[6]