Douglas Adams's Starship Titanic: A Novel

The Salmon of Doubt: Hitchhiking the Galaxy One Last Time (Dirk Gently Book 3)

Long Dark Tea-Time of the Soul (Dirk Gently Book 2)

And Another Thing... (Hitchhiker's Guide to the Galaxy Book 6)

Dirk Gently's Holistic Detective Agency

The Ultimate Hitchhiker's Guide to the Galaxy

So Long, and Thanks for All the Fish (Hitchhiker's Guide to the Galaxy Book 4)

The Bitter Man's Guide to Women

Mostly Harmless (Hitchhiker's Guide to the Galaxy Book 5)

Life, the Universe and Everything (Hitchhiker's Guide to the Galaxy Book 3)

We Are Legion (We Are Bob) (Bobiverse Book 1)