The book is worth the price just for that picture. In fact, conditions this morning don't mean anything this afternoon. Conditions are highly variable. Just because it's nice today doesn't mean it will be nice tomorrow. It could just as easily be bad tomorrow.
Conditions can go from flat glassy to very nasty in a couple of hours.
One morning I ran my whaler down to Carmel Bay in about 30 minutes under quite nice conditions. We did a first dive a MonoLobo Wall. During the surface interval, things started to pick up a bit. I did a second dive while my girlfriend sacked out on the bow locker. She was awakend by a wave breaking over the bow.