My rule about books in general, and watercolour in particular, is that one can never have too many. Books may be more or less helpful, but, as with all art forms the more ideas one is exposed to the better one refines their own style and technique. So here is a handful of watercolour books on my shelves and how they found their way there.
Of the most helpful of the “watercolourists” I have met through books (since I don’t actually know any in real life…) I have found Sterling Edwards to be my personal favorite. I like the way he talks about watercolour and his technique makes sense to me. Here is a sample YouTube clip I have found for you to get a sense of his work:
You will always get more out of painting videos if you can learn to ignore the extraordinarily dated music….