About the book: year / The book “The Mystery of the Mysterious Staircase” by Caroline Keene is offered to the attention of readers. Each paragraph of the text, in English, is provided with a link to the literary translation. The book is intended for high school students, lyceums and gymnasiums, as well as for a wide range of people interested in English literature and improving their language skills. ***Nancy is the daughter of the famous lawyer Carson Drew from the American town of River Heights. She often helps her father in solving complex and exciting cases.…