I have an array of books aka struct Book in the Top100Model below. I also have an array of books aka struct Data as well in the ISBNModel below. Both arrays have the same number of books and have a common property isbn13 which is a string holding a number. Id like to create a dictionary to merge the arrays so that it contains all the properties from Book in the Top100Model but add another two properties from the ISBNModel and copies the ‘subjects’ and ‘synopsis’ properties from the ISBNModel to this dictionary based on the matching isbn13 values. In trying the code below I’m getting a ‘Generic struct Dictionary requires that Book conforms to Hashable’. If I add the Hashable identifier to Book then it gives an error that it must be Equatable also

@State var bookFromTop100Fiction = [Book]()
@State var bookFromISBNDBbyISBN13 = [Data]()

var myDictionary = Dictionary(uniqueKeysWithValues: zip(
                                                 bookFromTop100Fiction, bookFromISBNDBbyISBN13))
                             
                          
print(myDictionary)

Top100Model below

struct Top100Model: Decodable {
  let results: Result

  private enum CodingKeys: String, CodingKey {
    case results
  }
}

struct Result: Decodable {
  let listsb: [ListB]

  private enum CodingKeys: String, CodingKey {
      case listsb = "lists"
  }
}

struct ListB: Codable {
  let books: [Book]
}

struct Book: Codable, Identifiable {
  let id = UUID()
  let author: String
  let description: String
  let isbn13: String
  let rank: Int
  let title: String
}

ISBNModel Below

struct ISBNModel: Codable {
  let total: Int
  let requested: Int
  let data: [Data]

}

struct Data: Codable {
  let synopsis: String
  let subjects: [String]
  let isbn13: String