About Chapter 4.  I worked through about 3/4ths of the chapter, so I have not addressed all errors as of yet. 

The First one, on page P. 166, line 10 of code.  It should read as follows:

.Filter = "Job_id = " & SelectionString & " ' " (omit spaces between the double quotes and the single quote).  A syntactically correct version a similar line of code can be seen on page 163. 

The Second on page 170. Not an error per se, but they did not instruct you to be sure you have a table adapter for each table (employee and jobs).  If you add you Employee ComboBox and bind it in the process, it will have a table adapter, but you must add another for the jobs table from which you will pull data to populate the unbound control (text box for job description).  (added 2/3/08 at 5:20 p.m.)

The Third one, on page 174, is probably not one that will mess you up, but under the heading (near bottom) "Find the Parent Row," it says the example gets the title column from the parent row and adds it to a list box, when it fact it adds it to an array.