golangでjsonデータを読み取る方法

package main
import (
    "encoding/json"
    "fmt"
)
type Book struct {
    Title       string
    Author      []string
    Publisher   string
    Price       float64
    IsPublished bool
}
func main() {
    b := []byte(`{
    "Title":"go programming language",
    "Author":["john","ada","alice"],
    "Publisher":"qinghua",
    "IsPublished":true,
    "Price":99
  }`)
//先创建一个目标类型的实例对象，用于存放解码后的值
    var book Book
    err := json.Unmarshal(b, &book)
    if err != nil {
        fmt.Println("error in translating,", err.Error())
        return
    }
    fmt.Println(book.Author)
}