Which C# 4.0 Book would you purchase, and why? [closed]

Question

I'm currently looking at purchasing a few C# 4.0 books, namely:

Essential C# 4.0 by Mark Michaelis or C# 4.0 Unleashed by Bart De Smet.

I am aware that both books are yet to be released, but would you consider purchasing either of these books, or would you recommend another?

Thanks for your time.

Clarification:

I'm not a .NET Ninja, but I do have 8+ years experience with the framework & related languages. So I'm generally looking for in-depth books. I also train/instruct the rest of my organisation generally 6 - 12 months after each .NET release. Each of the developers I train has the same or more .net experience than myself.

Once again thank you all for your time.

Update:

Thank you everyone for your responses. I've decided to purchase both books along with Visual C# 2010 Recipes: A Problem-Solution Approach, as suggested by Waleed Al Balooshi.

Answer 1

I was the technical editor for Mark's book. I quite enjoyed it, it is well written, and accurate.

An interesting thing about the difference between Mark's book and Jon's book (for which I was also the technical editor) is that both of them have accurate titles. "C# in Depth" really does go into quite a lot of depth; Jon doesn't shy away from the abstruse or theoretical, though of course he always has an eye on the practical. Mark's book really is more about cutting to what is essential to understand in order to get the job done. Both approaches are valid and reasonable.

Bart is a smart guy and I would imagine his book is quite good; not having read it, I cannot offer a personal opinion one way or the other.

Answer 2

I would recommend that you buy the MEAP (Early Access Edition) of Jon Skeet's C# in Depth 2nd edition, which is updated to include C# 4.0

In addition to this there is also:

1. C# 4.0 in a Nutshell: The Definitive Reference (Already Out)

Other than that I can't really say about the other books, because they aren't out yet, but I like the A Problem-Solution Series:

2. Visual C# 2010 Recipes: A Problem-Solution Approach (Not Out Yet)

I would wait till the books are out and you can read some reviews about them, till then I again highly recommend Jon Skeet's book.