internal void Start()
{
var pets = new PetController();
var books = new BookController();
var loop = true;
while (loop)
{
UI.PrintStartMenu();
var input = Console.ReadKey(true).Key;
switch (input)
{
case ConsoleKey.D1:
books.CallBookMenu();
break;
case ConsoleKey.D2:
pets.CallPetMenu();
break;
case ConsoleKey.D3:
loop = false;
break;
}
}
}