I would second Leo's advice of leaving books 7-9 until after the series ends, assuming that the series is only going to be up to book 6, which as far as we know it is.I've seen them all mate and the books up to and including 6, so haven't gone on to 7 yet - not sure if I should read the books first though? Is it a wise move as this is scripted to be the last season? The trailer shows an alien pig on steroids, so I'm not sure what the series will cover from the books if you know what I mean?