I have a couple of Sally’s books and they are (in my humble opinion) good. My main complaint was about the standard of the English, as I recall! However, I don’t consider myself an expert!
As you say, it’s a ‘freeby’ right now, so silly not to!

 

Yikes, I just recommended it to a friend who is a professional copy editor - however, I've no doubt that she will have seen worse!

 

😂 This is an updated version (I realised I have the original in hard copy.) Hopefully, some work has been done on the grammar (it’s not awful - and I confess to being a bit pedantic when it comes to sentence structure, etc! )