The digital book market is undergoing significant transformation as publishers, authors, and technology companies grapple with legal, technological, and ethical challenges. According to the 2024 statistical summary by the National Syndicate of Publishing, the French digital market generated 278.6 million euros, or 10.1% of the revenue from book sales by the publishers surveyed. The professional and academic segment represented 67.2% of this revenue, though this figure does not fully reflect the potential of novels converted into EPUB format. In 2024, digital revenue from literature increased by 8.5%, driven by romance, science fiction, and detective fiction, but this does not guarantee automatic success for all titles in these genres. The process of digitizing an entire catalog is complex and requires clear rights, appropriate files, solid metadata, and a minimum of animation. The first decision is not "how many?" but "which ones?" A test cohort of titles is recommended to dispel false certainties, with six key questions to consider: availability of digital rights, measurable demand, genre familiarity, usability of source files, editorial updating requirements, and the presence of a summary, cover, and launch plan. A well-prepared first wave of ten or twenty titles can provide more information than a mass digitization effort whose results no one follows. EPUB format is adaptable for continuous text, allowing readers to modify character size and content to fit the screen, while fixed EPUB is useful for comics, albums, or art books. PDF retains a composition, making it relevant for complex documents but less so for novels intended for various devices. The selection process considers commercial potential, legal feasibility, manufacturing cost, format compatibility, and promotion capability. In China, the live stream of books has entered regulation, with the revision project of the Regulation on the management of the publishing market specifying obligations for intermediaries, tightening control of sellers, and targeting piracy and certain pricing practices. In contrast, the National Syndicate of Publishing (SNE) and the General Information Press Alliance have assigned operators to the Paris court to block the platform Bookys, which offers books, newspapers, and magazines in free access without authorization. Oxford's Bodleian Library has partnered with OpenAI to digitize its collections, with internal documents revealing that the files produced have also fed the training data of the American company. Meanwhile, OpenAI has faced internal scrutiny over the use of pirated books from LibGen, with employees questioning the legality and cost of acquiring large quantities of books. A judicial settlement in the case Bartz v. Anthropic saw the company pay 1.5 billion dollars to rights holders for pirated books and destroy the files. AI's role in the book industry is expanding, with studies showing that 20% of fiction ebooks on Amazon contain more than 25% text generated by AI. This has raised concerns about quality, transparency, and the impact on human authors. In response, Dutch publishers have launched Bookpact.ai, a commercial platform to regulate AI use, while in Australia, 17 organizations have asked the government not to reopen copyright for AI companies. The use of AI in education is also under scrutiny, with Katherine Rundell arguing that AI-generated homework may hinder intellectual autonomy. In Japan, the National Library of the Diet is developing NDLOCR-Lite, a free tool to convert images of books into text without a dedicated graphics processor, aiding researchers and small institutions. The digital book market also faces challenges in sustainability, with HOP calculating that the renewal of Kindles and Kindle Fires could result in up to 470,000 tons of CO2 emissions. Amazon has faced legal battles over free delivery of books in lockers, with the French subsidiary finally respecting the law and ending the practice. In the audiobook sector, Spotify has integrated a tool for creating audiobooks by synthetic voice, while Alexandria offers an open-source tool to convert EPUB files into multi-voice audiobooks. The audiobook market is growing, with BookBeat reporting a 13% increase in revenue in Germany. The use of AI in content creation has also sparked controversy, with a novel worth 2 million dollars withdrawn from auction due to suspicions of AI use. In addition, a study published in Judgment and Decision Making found that readers preferred ChatGPT-generated stories if they believed them to be human-authored. The digital book market continues to evolve, with challenges and opportunities arising from legal, technological, and ethical considerations. As the industry navigates these issues, the focus remains on finding a balance between innovation, rights protection, and consumer demand.