Digital Books is an Android-based app developer that aims to popularize classic literature and support emerging authors. Their latest app, "Детектив Три загадки для Марго", is a complete version of the novel by Nadezhda Milovanova. The story follows the charming violinist Margo, who helps her friend Kati when her husband disappears under mysterious circumstances. The book is light, entertaining, and full of suspense.

The app is part of the "Проба пера" series and comes with a simple menu that allows readers to adjust the display settings to their device's characteristics. The book is small in size and does not require many resources from smartphones or tablets. Additionally, the app does not send SMS to premium numbers or collect personal information. Readers who enjoy the book are encouraged to leave a review and rating.

If you are an aspiring author and want to see your work turned into an Android app, you can contact Digital Books at or