The Parisian setting got me thinking about Bar Hemingway at The Ritz. The man himself was a lover of martinis and often took his garnished with Spanish cocktail onions—he preferred them frozen to keep the gin as cold as possible. Liquor.com has a simple recipe for the Gibson, which they dub “the martini's savory second cousin.” Swapping in the onion for the typical briny olive adds an umami undertone to the classic cocktail. Just note that these can be eye-blurringly potent. Drink more than one and you might not be able to read the book.