Can anyone please recommend a good music theory book? I have lots of resources here on GuitarTricks and people to ask questions but I need something more to take with me everywhere and study music when I have spare time...like when I am on the train travelling to work. I am currently just grabbing a mode of a scale, writing it out, then writing the same mode for each of the notes in the first scale so that I end up with a grid. From here I study the relationships between the notes and make intuitive connections.. What I really need is something a little more structured... starting from the basics and going all the way through to at least intermediate level, all in the one book.