This document describes the digital book conversion services of QuadLab. It offers all-in-one digital conversion of books and publications into e-book and other digital formats. Key advantages include compatibility with all digital formats, automatic proofreading, and copyright protection. QuadLab has experience converting Leo Tolstoy's complete works and works with scientific and textbook publishers. It supports many input and output formats and claims to have the fastest and most affordable conversion process compared to other vendors and freelancers. Contact information is provided for inquiries.