"Hitchhikers Guide to the Galaxy" -- Mostly Hard Quiz

Answer: Santraginean sea water

The full ingredients are as follows: Ol' Janx Spirit, Santraginean sea water, Arcturan Mega-gin, Fallian marsh gas, Qualactin Hypermint extract, the tooth of an Algolian Suntiger, Zamphuor and an olive.

Answer: Max Quordlepleen

Max Quordlepleen: "So many of you come time and time again to watch this final end of everything which I think is really wonderful and then to return home to your own eras and raise families, and strive for new and better societies and fight terrible wars for what you know is right, it gives one real hope for the whole future of lifekind. Except of course we know it hasn't got one."

Answer: Big Bang Burger Bar

"Good evening ladies and gentlemen, I am your host for tonight, Max Quordlepleen, and I have just come straight from the other end of time where I have been hosting a show at the Big Bang Burger Bar and I will be your host for this historic event - the End of History itself."

Answer: Share and Enjoy

The words "Share and Enjoy" were displayed in huge lit-up letters three miles high outside the Sirius Cybernetics Complaints Department. However their weight caused them to collapse through the underground offices of many young executives, killing them all.

The upper half of the sign can be seen above the ground and in the local language it unfortunately translates as "Go stick your head in a pig". It is only lit up on special occasions.

Answer: Eroticon VI

When Arthur looks in the guide the entry for Earth is under that of Eccentrica Gallumbits. A newsreader quotes Eccentrica describing Zaphod as "The best bang since the Big One". Some people say her erogenous zones start some four miles from her actual body. Ford Prefect disagrees, saying five.

Answer: Ameglian Major Cow

The Ameglian Major Cow is a species specifically bred to not only have the desire to be eaten, but to be capable of saying so quite clearly and distinctly.
Cow: "May I urge you to try my liver, it must be very rich and tender by now, I have been force feeding it for months?"

Arthur (disgusted): "Is there any reason why I shouldn't have a green salad?"

Cow: "I know many vegetables who are very clear on that point sir, which was why it was decided to cut through that whole problem by breeding an animal that actually wanted to be eaten."

Answer: A super-intelligent shade of the colour blue

The creature with fifty arms is a Jatravartid, being the only race in history to have invented the aerosol deodorant before the wheel.

Answer: Perfectly Normal Beast

They are captured using pikka birds and the meat is placed between two slices of bread by the sandwich maker (Arthur). Arthur and Ford ride them into the domain of the King.

Answer: Alpha Centauri

Being only five light years away, the Vogons are amazed that no-one had seen the notice for the Earth's demolition. It is also home to the both small furry creatures. In the real world Alpha Centauri is the closest star system to ours.

Answer: God's Greatest Mistakes

The fourth and final book in the series is called "Well That About Wraps it up for God". He also wrote "Everything You Ever Wanted To Know About Guilt But Have Been Too Ashamed To Find Out" and "Everything You Never Wanted To Know About Sex But Have Been Forced To Find Out".