The Internet is a directory, but a good guidebook guides
Guidebooks as we know them have declined not simply because reading habits are shifting. The product shifted first. Guidebooks became dispensable because guidebooks, as we now know them, do not retain many of the characteristics—concision, opinion, direction—that once made them an important tool for sorting through the chaff. It's been so long since guidebooks guided that we forgot what it means to do so.