Just remember any book is good for the basics, but so much is constantly changing in this hobby that even Palmer is out of date, hence the who "people who misread Palmer's section on autolysis and think you need to move your beer out of primary -vs- the trend in the last few years to go the month in primary/no secondary route.
This is where the most up to date brewing wisdom and ideas can be found...In fact a lot of stuff has been started on here, and made it into byo or zymurgy or podcasts...in fact BYO DID a piece on no secondary/long primary, along with the BASIC BREWING PODCAST and even they said that there were no issues/harm with doing it and in some beers it did actually improve the flavor and clarity. And I believe that really WAS influenced by the discussion we have had for the last couple years on here.
Ideas change with science....Here's a good example John Palmer basically admits that what he wrote about IBU's in How to brew, was essentially "wrong" or at least outdated in light of new science...
I cite that podcast as an example of how the knowlegebase shifts so fast in this hobby because of places like this or podcasts...A book is a snapshot of the author's body of knowledge and the "common wisdom" at the time the author wrote the book, which may mean 3 years before it was even published. Papazian's book is 30+ years old. The basic knowlege is good, but brewing science and experience has progressed to where some things an author believes or says at that time may no-longer be valid...even to the author.
In that Podcast, Palmer basically contradicts in some was what he wrote in HTB...and I bet it will be reflected in his subsequent writings, but if he doesn't go back and revise HTB, and people don't read or listen to anything by him after, than they won't realize that the knowlegebase has already shifted...
And well probably start seeing long primary mentioned in more and more books in the future.