To maintain consistency and provide you with the best information available, any new or updated guides will supersede and replace previous guides. Previous guides will not be available for purchase.
This really depends on how much of the guide will be changing. The 2023 update has been one of the more comprehensive and extensive updates to date. It has a new look, new interaction components, more content, more sites…a lot of time and energy goes into these Travel Guides, so this update resulted in a price…
The Travel Guides are updated routinely, some updates are more comprehensive, while others may fix small errors – ideally, these are done at least annually.
ALL of these Travel Guides (older versions or current) have everything you need to plan the trip of a lifetime. Newer guides (and their accompanying maps) will contain more current/updated information, and often more content than previous guides.