E-book conversion format refers to the process of converting an e-book file from one format to another. Usually, the purpose of e-book conversion is to store e-book files on different devices or platforms such as mobile phones, tablets, or computers. Some common e-book conversion format include: 1. E-book format (ebook, PDF1, etc.) 2. Image format (such as jpg, png, gif, etc.) 3. Text format (such as txt, docx, docx, html, jmp, etc.) To convert an e-book to another format, you can use various e-book conversion tools. These tools could usually be used on computers or mobile phones. For example, you can use online tools (e.g. iBooks, Google Play Books, etc.) or download software (e.g. Amazon iPhone Store, Google Play Music, etc.) on your computer. It was important to note that converting the e-book format might affect the quality and reading experience of the e-book. Therefore, before converting an e-book format, you should carefully consider the purpose and needs of the e-book and choose a suitable format.