// BookName Check
 public bool bookNameCheck(string bookName)
 {
     if (string.IsNullOrWhiteSpace(bookName) || stringFirstLetterSpaceCheck(bookName))
     {
         print.bookNameFirstNoSpaceMessage();
         return(true);
     }
     if (stringCheck(bookName, 6))
     {
         print.bookNameWrongMessage();
         return(true);
     }
     return(false);
 }