Sandcastle was a good read since I have already seen the movie Old.  Had I not seen the movie, I would have had quite a number of questions, because this book is full of plot holes (the movie fills them in).  That said, it was still a fun book.  The black and white is appropriate in that it adds to the thriller aspect. Illustrated very well.   Plot was definitely unique and enjoyable.  There was quite a bit of nudity, no graphic sex but definitely included (maybe too much added), and racism.  Book has many shockers and is enjoyable.  It is a quick read, but I definitely suggest adding the movie into your schedule.  I think after watching movie, it lessened my enjoyment of this book.