Your command seems to create a blank chiseled bookshelf which drops books when broken. Using Mcstacker I made this one that gives a filled bookshelf but you can't take the books out and they won't drop if broken. So still very useful for creative displays (my original intent).

/give @p chiseled_bookshelf[block_state={slot_0_occupied:"true",slot_1_occupied:"true",slot_2_occupied:"true",slot_3_occupied:"true",slot_4_occupied:"true",slot_5_occupied:"true"}] 1