Xcode 6 Essentials

seemed promising but falls significantly short

Looked like a good book from the sample, but I found reading it and working through the examples very frustrating. Some things are explained in minute detail, other times whole critical parts of the example project instructions are left out, leaving you to google around in order to work out how to complete the next step. The first half of the book is about swift - which is basically regurgitated information from the free and excellent IBooks from Apple.
Things like getting layout right in interface builder (for me one of the trickiest and most obscure part of Xcode) is passed over with a short summary. I gave up about two thirds the way through. I am a Microsoft developer who is moving to iOS and just wanted a book that sows me how to use the Apple IDE properly - and this book fails in this respect