As I mentioned in my tweet, Lee Phillips is writing a book titled “Applied Julia” (working title):
Many of you may know him as the author of various Julia related articles on Ars Technica and LWN - most recently the article on what to expect in Julia 1.7. As the first few chapter drafts are ready, he is looking for someone knowledgable with Julia to help review the book and make it really good. Lee is a writer and programmer who has actually done scientific computing. I am looking forward to the book (but do not have the time to help review).
Please feel free to reach out to him directly if this interests you.