If anyone wants to learn alongside me, then here's a link to the book. It's not that expensive. There are some nice little tunes in there. I have done two of them so far. Looking froward to the other 7.
Also another must have for me is the AB Guide to music theory. I think I have owned this book about 3 or 4 times and lost it since I was about 14 years old. It's the bible of music theory and is the go to reference on scales, rhythm, key signatures and time signatures. it goes on to discuss advanced scales and harmony further on.
Those are two ones I would start with to get a great solid foundation!