Writing Books for Writing Teachers

Few days ago Stacey posted a question about the best books for new writing teachers. I have been thinking about the books that I have and use when teaching writing. Which ones would I recommend for new teachers (and for others as well)?
Here are my takes:

• Learner English: A Teacher's Guide to Interference and other Problems  by Swan and Smith (2001) - This is my go to reference when teaching ELL students writing. I can look a language group see what are their typical challenges when it comes to learning English. Are there particular language functions or mechanics that I should focus on? Are some grammatical aspects so similar that I don't really need much time to spend on those but can focus on others?
• Understanding ESL Writers by Leki (1992) - This book combines the cultural practical aspects of writing. As an ELL teacher, it is essential that I know where my students come from, what are their previous educational experiences, and their level of English proficiency when in my class. In addition, I must also understand how students from other countries might view personal writing. How about error correcting? Do I need to correct everything (or should I)? Leki answers these and many other questions in her book. If you are a mainstream teacher who occasionally has a few ELL students in your class, I would highly recommend this book.
• Reading and Writing in More Than One Language by Franklin (1999) - Great resource for mainstream teachers who have ELL students in their classes. This book addresses both reading and writing challenges that teachers face when ELL students enter their classrooms. Full of practical tips.
• iWrite by Wilber (2010); The Digital Writing Workshop by Hicks (2009); When Writing with Technology Matters by Bedard & Fuhrken (2013) - All these books address technology issues in the classroom. I believe that it is an essential component of today's writing teacher. As a blogger, I definitely want to incorporate blogging into my classroom practices as well.
• Real Revision by Messner (2011) -  I have learned so much about revision from Kate Messner! She show with concrete examples both in the book and also on her blog. Here is one example from her blog, and here is another. Kate's examples can be applied to both fiction and non-fiction writing. And at least for me, revision is my biggest challenge with my students!
• Write Beside Them by Kittle (2008) - From Penny Kittle I learned to write when my students are writing. How can I teach writing if my students never see me write? I think this book is essential for secondary teachers who want to make a difference in their students writing lives. We must teach writing by example just like we do reading.
• Write Like This and Teaching Adolescent Writers by Gallagher (2011 & 2006) - both book are a MUST for secondary teachers! Full of examples, suggestions, student work samples and ways to push students to become more fluent writers (just like the common core challenges us to do). These books are on my table/shelf all the time. I am referencing them when writing my lesson plans, designing my handouts and assignments. My students see me use these. And again, modeling, using mentor texts, working with real life situations; this is what my students need.
• Mechanically Inclined  by Anderson (2005) - As a writing teacher, I don't think that I could compose a list and not include at least one book that addresses the mechanics of writing in more detail. I have found Jeff Anderson's book to have a low stress level for the teacher and an easy to approach grammar attitude for the students. Definite keeper for ELL teachers!
• PreK-12 English Language Proficiency Standards by TESOL (2006) - As an ELL teacher, I cannot be without this book! It is part of what I do. I believe that this book is an essential resource for anyone who has even one ELL student in his/her class. In order to make sure that ELL students are progressing on their journey to attain proficiency in English, teachers must educate themselves on ways to implement a program that assures improvement and eventually proficiency in all four domain of English language. 

Which books would you add? Have you read a new book that you believe would be an essential addition?