I believe the OP means the line in the Listbox...not a line in code.
Which column of the Listbox is the Bound Column? (Don't confuse this with the Listbox itself being Bound) C_BookID is the last Column, per your posted SQL Statement, and it would have to be the Bound Column in order for your code to work...and would not be so by default...I believe you'd have to manually change that.
Linq ;0)>
The problem with making anything foolproof...is that fools are so darn ingenious!
All posts/responses based on Access 2003/2007