BookJson.cs

public class BookJson
{
    [JsonConstructor]
    public BookJson(string author, string isbn13, int pages)
    {
        Author = Sanitize.RegexReplace(pattern: "( ){2,}", replacement: String.Empty, input: author).WhiteMatch(@"[a-zA-Z\. ]+");
        ISBN13 = Sanitize.RemoveWhitespace(isbn13).BlackList(@"\-");
        Pages = pages;
    }
    
    [JsonProperty("author")]
    public string Author { get; }
    
    [JsonProperty("isbn13")]
    public string ISBN13 { get; }
    
    [JsonProperty("pages")]
    public int Pages { get; }
}