excel – Problem with String “n0:” in SelectNodes call

I am using the method SelectNodes in my program.
The XML I want to process starts with

<?xml version="1.0"?> <n0:Books> <BookHeader>....

When I delete the “n0:” in the XML I am able to use the method SelectNodes without an error.
Unfortunately the “n0:” is in thousands files and therefore I need to find a way to handle the “n0:” at the beginning but when I call the method SelectNodes(“//n0:Books/BookHeader”) I get an runtime error with unknown error.

All examples I found didn’t have a prefix like “n0:”.

Can someone tell me how to use the “n0:” in a correct way? Thanks