I downloaded & printed four sets of IPT notes from the Resources Sections and used them as some light reading for when I was bored, or for skimming etc to make sure I knew all the definitions and principles of the course (because most textbooks are crap and don't cover EVERYTHING there is) so I prefered to get a range of sources to help me study.
Databases by Alex and Gem Max.
Communication by Alex and Vnice2day.
But yes, this was not sufficient on it's own. I made my own thorough notes, a summary and detailed contribution from all of these sources plus the textbooks plus my teacher's notes etc.