Answer
Milne's first published book was "Lovers in London," a collection of short stories and poems. The book was published in 1920 and established Milne as a promising young writer. Milne's writing style in "Lovers in London" is characterized by its wit, charm, and keen observation of human nature. The book's success paved the way for Milne's subsequent works, including his beloved children's books featuring Winnie-the-Pooh.