Delightful Detectives

Here are the authors. Name the detectives. Then use the highlighted letters to spell a new word.

Carolyn Keen's teen crime solver
Arthur Conan Doyle's famous consulting detective
Dashiell Hammett's hard-boiled hero
Agatha Christie's shrewd old snoop
Franklin W. Dixon's team of brother detectives
Real name of Philip Pullman's Victorian-era investigator, Sally
Gertrude Chandler Warner's Alden orphans