Misc: Germany's WW I allies were Austria-Hungary, Bulgaria, and ________?

Questions

Hitchhiker Guide: He especially liked designing the crinkly bits in fjords?

Kulture: She wrote "Valley of the Dolls"?

McDonalds: After the first cup of this beverage, refills are usually free?

McDonalds: Sesame Bun, thick pattie, extra cheese, pickles, sauce?

McDonalds: These things may sound like Scottish lumps of gold, but are food?