I see the Sweet Pipes books on Amazon but they don’t seem to come with audio which I think would be a plus. And there’s multiple versions of their books and I’m not sure which one would be best to begin with.
I’m not familiar with those books, but I suspect that there are “multiple versions of their books” because one book is probably for soprano instruments and another is for alto. I think. So, please be sure to buy instruction books for the instrument you have. It is very important.