"I am brand new to functional programming and this is my 3rd book having gone through both Foundations of F# and Expert F# which details the language very well. However, I was blown away with this book. While it does have some technical elements/examples to it, I found that it helped me bridge the gaps in some topics I did not fully grasp from the other two books.
This was written prior to the F# Sept 2008 CTP and due to changes in the language, one or two examples (again,let me stress just a few) needed to be modified in order to be compatible with the changes.
I enjoyed all the topics immensely but without a background in DirectX or 3D programming, while the chapter on visualization is beautiful, it is challenging. My readings in WPF3D helped a lot in parsing what was going on here. In addition, while there is information on using Windows Forms, I wished there was a section (or two!) on WPF. However, the F# Journal (by the same author) does have a few articles on WPF which are also very excellent.
The only thing is that, sometimes, the explanations for the examples are not very thorough, and it is a bit daunting as a beginner. One such example is the Powerset from 6.4.15 (p167) which took a while to work through. As such, I made a blog post just for this detailing how to get the solution for this.
This is not a book to, per say, 'learn F#', the previous two are for that. F# for Scientists is great if you already have the basics at hand. All in all, I HIGHLY recommend this book. It is an excellent resource/reference and in my opinion, it is one of those books you have handy -> Just in case.
And don't forget about our more recent book F# for Technical Computing.