Air Law is without doubt the most turgid and boring, except that you have to know some of this stuff very well - and some you can forget the next day cos you'll never need it.
I used the "pickle" method to pass mine - took the book to Mallorca, sat under an umbrella while the family cavorted in the sea/pool, and drank a jug of Sangria while reading and re-reading the book. Two weeks of that, flew home on the Sunday, took the exam on the Monday morning, and forgot most of it by Tuesday (when I'd sobered up?)
Then re-learned the bits I really need when I realised I really needed them!