I submitted a book manuscript to Springer. The editor told me that it looked great and that they would send it for peer review and would contact me in due course. But I haven’t heard of the project for 7 months. I don’t even know if it’s under peer review, since it’s not an article and therefore I don’t have the journal’s progress bar to check on. A month ago, 3 days before the six-month mark, I sent an email asking about status (because when I’ve been given a deadline to review a full book, it’s been 6 months). I received no answer. Question: is it OK if I insist with another polite email on the 7-month mark?