Pocket collected the three books into one novel?! Thanks for telling me this! I just put the omnibus on my Wish List.
This is actually nice. Don't need another three small books on the shelf when it can be combined. I'll make sure to check if a trilogy is collected as a single omnibus in the future if one of the segements get sold out.
Amazon is my go to place for books. Whever books get out of print, I become so disappointed.