This is a June book, and if summer deigns to stay, it should be the June book. For it con tains the recipes of the nec tar which Mr.Adair dispenses at that newest and most in triguing of restaurants for which M. Boulestin purveys the ambrosia. And if you have made your way to that corner df Leicester Square where Boulestin's hangs out a tricolor awning, you will know that Mr. Adair's cock tails and juleps and punches are drinks with a difference. What riches are here for the thirsty—drinks long and short, steaming and iced, dry drinks, sweet drinks, stiff drinks, soft drinks (yes, one or two for "our American friends"), and a preface. In a Glass, by M. Boulestin, ex hilarating as a cocktail itself.