Modern books are typically published after 1970 with invent of the ISBN(international standard book number). They are called 'modern' because two standard sizes are common
- 8.5 inches high by 5.75 inches deep
- 9.25 inches high by 6.5 inches deep
- These two dimenions gives modern books a more uniform appearance on bookshelves. Modern book publishers also take advantage of the full color spectrum with bright and vivid colors as well as the standard blacks and reds.