From my search, the title of the book by Mark Carwardine and Stephen Fry is
"Last Chance to See: In the Footsteps of Douglas Adams". From the description, that's a reasonable title for the book as it is a direct followup of the original. But, it looks like the on-line stores have decided to drop the second part of the title. They are probably treating it as a subtitle rather than an integral part of the full title.