data class ARBook(
    val size: MyVector3,
    val position: MyVector3,
    val rotation: MyQuaternion,
    val bookModel: Book,
    var isTopBook: Boolean = false
)

data class MyQuaternion(val x: Float, val y: Float, val z: Float, val w: Float)
data class MyVector3(val x: Float, val y: Float, val z: Float)