The Using EWB book was a huge project so there were bound to be some minor mistakes.  Two editing mistakes have been reported thus far.

They are listed on my web site at http://erickengelke.com/errata.htm and I've copied them here.

Debugging Section

Page 62.  There is no debugcode.js anymore.  All the examples shown work directly from EWB and do not require an external JavaScript library.

Google Charts

Page 221

We are missing part of a sentence.  It reads "...Set its onload to" instead of
“Set its onload to Script1Load and its URL to https://www.gstatic.com/charts/loader.js".

Erick