Misc: What kind of rain was New York cop Michael Douglas running through in Japan in 1989?

Questions

Which was Dickens' first novel?

A Study in Scarlet was the first novel to feature which literary character?

Who was the head of the National Unity party in Norway in 1942?

Hitler annexed the Sudetenland in the 1930s. Of which country was it a part?

Which author wrote "If not actually disgruntled, he was far from gruntled"?