Is there any plans to update "C# Essentials"?
I want "Objective-C Essentials" too.
(I think that its good to make "Essentials" series.)
Thanks for writing us, and I'm sorry for the delay in getting back to you. We don't currently have plans for an update to C# Essentials, but it's really useful to know there's an interest in it. I'll pass your comment on to the editors for C# and Objective-C.
While they're not the same kind of book, we do have some new and upcoming C# and Objective-C/iOS books that might be interesting to you:
C# 5.0 in a Nutshell
Programming C# 5.0
Learning iOS Programming, 2nd Edition
Programming iOS 5, 2nd Edition
Learning Cocoa with Objective-C, 3rd Edition
Thanks for letting us know what you're interested in!