I found sometimes that some chapters were hard when it came to how to flip the board pieces. How deeply should one read, or look at the pictures, etc.? Don't want to cheat!
I generally only read up to where the specific information for playing the first tile starts.
When playing with younger players, It is really best to either read the complete chapter, or to play the chapter solo before playing with the group. I found that if I don't do this I spend a lot of time going back and forth from the game to the scenario book and rule book, which is too much down time to keep kids interested.