Make sure you didn't miss anything with this list of the Best of the Week in the Mobile Zone (May 23 to May 29). Here they are, in order of popularity:
Learning Objective-C by developing iPhone Games is a book that you can pick up with no prior knowledge of Objective-C. I will be hard pressed to say if you have no prior programming experience you can pick this one up and be an ace afterwards, but I wish I had this book when I started off with Objective-C.
Remember that visualization of Apple's App Store? Well, Android users, now you don't have to feel so left out, because somebody has been visualizing your store, too: from Winnie Tong comes a visualization of the top 500 highest-grossing Android apps, color-coded by category.
Android has security features built into the operating system that significantly reduce the frequency and impact of application security issues but as application developers, its our job to secure an application.
There are still some people who still think of "mobile" as an afterthought. Here are 2 statistics (from last year) that highlight how, world wide, there are far more people using mobiles (smartphones and feature/dumb phones) than are using PCs (including tablets).
Yesterday, Xamarin 3 was announced. According to the overview from Nat Friedman, this release will bring four major changes to your app development process with Xamarin.