Hey, didn't see you that. It's me. I've got a book. What is the book? Practical English in usage by Michael Swan. Can you see how thick that is? It's very thick. I just want to say that this book is quite nice as a reference guide. If there's some part of English grammar which is really not clear for you, this can be really good to look up a specific point. You might be wondering what the difference is between this and that. You just go to your index, look up this and that, and you've got some good examples. So I really like this book. Michael Swan's Practical English in usage. It's helped me out a lot in my English lessons and I think it could help. Especially advanced English learners, I think it's a good book to have. Perfect. This has been Lungless with Charles. Don't forget to leave a like. Subscribe. Have a great day.