Yes, it definitely dovetails with what DeWitt says about the Summum Bonum as it relates to pleasure and life. For clarity's sake it makes sense to say that pleasure is the highest good, but pleasure is inseparable from life both superficially (in the 'duh' sense) and at a very deep level.
I almost quibbled with the sentence "There is no Truth", except that by capitalizing the word the author makes a very important and, as I think, philosophically sound point; that capital-T "Truth" does not exist in the abstract apart from fact, physical nature, human understanding, etc.