Michael Lecker's review of Gibson's Qur'ānic Geography in the Journal of Semitic Studies from 2014, ends with the sentence: "This book’s imaginative writing may have its followers, perhaps even in academic circles. But the study of early Islamic history is better served by small steps, one at a time." Historian Daniel C. Waugh wrote a sceptical review in The Silk Road, in which he criticizes mistakes in Gibson's book but leaves open whether Gibson's central claim of early mosques pointing towards Petra is right or wrong. In 2017 Salim Al-Hassani, founder of the academic history of technology portal Muslim Heritage, published a highly critical review of Gibson's Early Islamic Qiblas by a subject matter expert on medieval Muslim astronomy, David A. King, author of World-Maps for Finding the Direction and Distance to Mecca: Innovation and Tradition in Islamic Science, many articles on qibla, and several articles in the Encyclopedia of Islam. King argued that early Muslim Arabs were unable to precisely establish Qiblas when building new mosques until later mathematical developments made precision possible. Further, King wrote, many variations in orientation are better accounted for by regional and local practices, imperfect geography, and folk astronomy. King noted Gibson's inadequate grasp of mathematics, citing Gibson's "spherical polygons" as inexplicable. King summarized his analysis of Gibson's work as an "amateurish, non-scholarly document that is both offensive to Muslims and also an insult to Muslim and Western scholarship." Gibson placed a response to King on academia.edu, "Dr. King on the other hand is convinced that the sloppy qiblas actually intended to point: east, west, solstices, sunrises and so forth. I have not come across anything in Islamic religious manuscripts that support these Qiblas. But perhaps in time someone, somewhere will stumble across something that will change our understanding of Qiblas. All I have found so far, is that every Muslim expects the Qibla to point to Masjid Al Harām."
