- Apes, Angels & Victorians: The Story of Darwin, Huxley, and Evolution
- Do Geese See God?: A Palindrome Anthology
- Washington-Irvine Correspondence: The Official Letters Which Passed Between Washington and Brig.-Gen. William Irvine and Between Irvine and Others ... the West From 1781 to 1783
- William Irvine: At Home
- Letters On Sicily