If I give any player the following book it looks different depending on if the player is OP or not.

/give @p written_book 1 0 {pages:["[\"\",

{\"text\":\"- Player Handbook -\n\n\",\"color\":\"dark_red\",\"bold\":\"true\"}

,

{\"text\":\"Your Credits: \"}

,{\"score\":{\"name\":\"@p\",\"objective\":\"Credits\"}},

{\"text\":\"\n\n\"}

,

{\"text\":\"Rules:\n\"}

,

{\"text\":\" -No flying.\n\"}

,

{\"text\":\" -No Hacking of\n any kind.\n\"}

,

{\"text\":\" -No Glitching\n\"}

,

{\"text\":\" -All bugs must\n be reported.\"}

]"],title:Book,author:TellrawGenerator}

as can be seen in the picture, Left = OP, Right = none OP

Both have the exact same book.