LINQ in Action is doing well. We're all happy with the sales and all the reviews, on Amazon (5 stars on average) or on blogs.
In fact, the book is doing so well that the publisher has to print a second edition! We didn't expect that it would happen so soon :-)
We've updated the text where needed, according to the errata we've collected since the first edition was published, back in February. The new files are being sent to the printer right now.
If you see something else that could be improved (for the third edition...), feel free to post a comment to the new errata page or in the forum.
LINQ in Action can be found on Manning's website (with all the details and sample chapters), on Amazon.com, Amazon.co.uk, Amazon.ca, Amazon.fr, Amazon.jp, Amazon.de, BarnesAndNoble.com, and many more online and offline bookstores!