Not sure that this is the right place, but...
My suggestion is about the text of the 1st chapter. I wish you added a "de" to the word "pluralizes" in
"By default the LINQ to SQL designer automatically "pluralizes" table and column names when it creates
classes based on a database schema. For example: the "Dinners" table in our example above resulted in
a "Dinner" class."
because this is what happens: linq2sql kills plural (Dinners in SQL give birth to a Dinner class.)