Tiggermoth,
If you found PPL Air Law uninspiring, wait 'til you do it at commercial level!! The PPL syllabus contains the stuff you need to know, the ATPL/CPL syllabus contains more useless shyte (please bear in mind folks, that I'm a helicopter and these exams are fixed wing biassed) about the structure and history of ICAO and annex numbers etc.!
Cheers
Whirls