The grammatically correct option is "Ring with PL 9." This option uses the correct preposition "with" to indicate the association between the ring and the PL 9 attribute. The second option, "Ring with P9 golden," is not grammatically correct as it does not use the appropriate preposition and the word "golden" is not necessary in this context. **

Yes, the Shadowhunters books are available as e-books. Readers can purchase and download digital versions of the books from various online retailers such as Amazon Kindle, Apple Books, and Google Play Books. This allows fans to easily access and read the series on their e-readers, tablets, or smartphones. **

School books can be converted into e-books by scanning the physical book and converting it into a digital format. This can be done using specialized scanning equipment or even just a smartphone camera. Once the book is in digital format, it can be uploaded to e-book platforms or school learning management systems for students to access. Additionally, interactive features such as quizzes, videos, and audio recordings can be added to enhance the e-book experience for students. **

Yes, I have experience with self-publishing books. I have self-published several books through platforms like Amazon's Kindle Direct Publishing and IngramSpark. Self-publishing allows for greater creative control and higher royalties, but it also requires a significant amount of marketing and promotion to reach potential readers. It's important to carefully consider factors like cover design, editing, and distribution when self-publishing a book. **

Some books only appear as e-books now due to various reasons such as cost-effectiveness for publishers, environmental concerns, and the increasing popularity of digital reading devices. Publishing e-books eliminates the need for physical printing and distribution, making it a more sustainable option. Additionally, e-books allow for easier accessibility and convenience for readers who prefer digital formats. Lastly, some niche or self-published books may only be available in e-book format due to lower production costs and wider distribution opportunities in the digital realm. **

Non-fiction books can be used as e-books by converting the physical book into a digital format that can be read on e-readers, tablets, or smartphones. This allows readers to access the content anytime and anywhere without carrying a physical book. E-books also offer features such as search functionality, highlighting, and note-taking, making it easier for readers to interact with the content. Additionally, e-books can be easily updated with new information or editions, providing readers with the most current and relevant content. **

It is possible that school books will be made available as free e-books in the future. Many educational institutions and publishers are increasingly moving towards digital formats to make learning materials more accessible and affordable. Additionally, the shift to e-books can also reduce the environmental impact of producing and disposing of physical books. However, the transition to free e-books may depend on various factors such as funding, technological infrastructure, and the willingness of publishers to make their content available for free. **

'Pl' is an abbreviation for the word 'please.' It is commonly used in informal communication, such as text messages or online chats, to politely request something or to express a polite sentiment. For example, someone might say "Can you send me the document, pl?" to ask for a document in a polite manner. **