There's no reason a state should have a state book to begin with.
Amen! We have a proliferation of useless state symbols, especially here in South Carolina.
From the animal kingdom alone we have besides the state animal, the white-tailed deer, a state amphibian, a state bird, a state game bird, a state duck, a state butterfly, a state dog, a state fish, a state heritage horse, a state heritage work animal, a state insect, a state marine mammal, a state migratory marine mammal, a state reptile, and a state spider!
Somehow we are one of the few states without an official state fossil (unless one counts Strom Thurmond).