You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: BESTSELLERS 
Clue: "Gettysburg", cowritten by this former House speaker, imagines a Confederate victory at Gettysburg
newt gingrich

Category: SWEETS 
Clue: If you're looking for a chocolate bar chock full of peanuts, try this one introduced in 1925
mr. goodbar

Category: THE MATERIAL WORLD 
Clue: In building, you get a rough look with beton brut, this material left just as it was poured

cement