A few years ago he caused a privacy scandal by uncovering that your iPhone was recording your location all the time. This caused several class action lawsuits and a U.S. Senate hearing. Several years on, he still isn't sure what to think about that.
"Overall, this is a fast read and an excellent resource. I can't call it a definitive guide, but it is a great primer on the most useful geolocation features in iOS, with a set of real-world examples."
--Chris Mattmann, Computing Reviews
"His pacing is superb, the content detailed, and his examples spot on."
--David Bishop, Bishop Universe
"I cannot stress how brilliant the book Learning iPhone Programming Development by Alasdair Allan is."
--Nick Reffitt, iOS Blog
"I love the way the series is set up. Unlike other video tutorials I've tried, Introduction to iOS Programming is broken into smaller sections. You can start and stop the videos whenever you want, which is great when you have to reference certain aspects of the program or need to backup and watch something again."
--Ricky Tucker, Game Vortex
"So, if you are interested in a crash course into iPhone programming before you dig into it with a more detailed book, this is the one to get. But, it will leave you with the thirst to learn more. Me? I am heading to the OReilly catalog to look for an Objective-C book..."
--Richard Slywczak, GRApple, Volume 12, Issue 1, February 2011
"The great strength of Allan's book is that it gives you a clear view of the big picture about iPhone development, and fills in most of the essential details. I can hardly imagine a better book to begin the great adventure of developing extraordinary apps."
--Michael Pastore, ePublishers Weekly
"I recommend the book to anyone considering diving into iPhone programming...Learning iPhone Programming is reasonably priced and should remain a solid introductory text for new iPhone developers for some time to come."
--Mike Riley, Dr. Dobb's CodeTalk