So what do you use your Black Book for?
Then you could move on to some advance wildstyles or Burners. These take years of sketching to perfect and take some time to do:
Black books are the very beginning of graffiti, its were you keep all your work, where you practise, where your masterpieces are created. Any piece that's every been on a wall has probably been in a black book first. Black are an essential piece of kit.
Thanks for reading,