Dirk Gently's Holistic Detective Agency

Dirk Gently's unconventional methods and humorous outlook make him stand out. I'm curious what sparked Adams's idea for this eccentric detective.

The plot jumps around quite a bit, but it all somehow ties together. Did the randomness enhance the story or make it harder to follow for others?

The blend of scientific concepts with absurdity is so distinctive. I wonder if his scientific knowledge shaped the story’s worldview or humor style.