I am a C# developer in my professional life, but I have been a Mac enthusiast for years. I just never built up the steam to learn Cocoa until quite recently. I have the 2nd edition of the Hillegass book, and it is great. I have it in my backpack right now! If you go to amazon you will find that the new 3rd edition will be released in less than a month. You can pre-order it now and save some money too. (I already have mine ordered.) The best thing I can suggest to you is to find someone who also wants to learn Cocoa and pair up. I am a big proponent of Agile techniques and I find that pair programming really helps me to learn new tech. The process of bouncing ideas off one another is truly constructive.