Readbook.cloud is a GPT powered by ChatGPT that serves as an online library and e-book subscription service. As a GPT, Readbook.cloud has been designed to facilitate seamless access to a wide range of digital books, connecting readers to various resources based on their preferences. Users can engage with this tool by prompting it with specific requests such as 'Direct me to more on this topic', implying that it can provide directions to more extensive content on a specific topic. It also highlights the functionality of providing direct access to e-books from prominent publication resources like 'The Economist', 'The New Yorker', 'The Guardian', 'Wired', and 'The Atlantic', demonstrating a wide range of literature selection. This GPT is tailored to appeal to different reading tastes covering a variety of genres and topics. By leveraging the capabilities of ChatGPT, Readbook.cloud offers user-directed exploration, enabling users to discover new reads or peruse their favorite resources. To use this tool, one is required to sign-up and it necessitates having ChatGPT Plus. Conclusively, Readbook.cloud is a smart toolkit for book enthusiasts who are seeking an exhaustive, accessible, and reader-friendly digital library service.