The Hitchhiker's Guide to the Galaxy
I got hold of this one while on JM road. This one contains the four parts of the “five part trilogy”.
The books are described as “a trilogy in five parts“, having been described as a trilogy on the release of the third book, and then a “trilogy in four parts” on the release of the fourth book. The fifth book was originally released with the legend “The fifth book in the increasingly inaccurately named Hitchhiker’s Trilogy” on the cover. Subsequent re-releases of the other novels bore the legend “The [first, second, third, fourth] in the increasingly inaccurately named Hitchhiker’s trilogy.”
More about it on .