Book $($class$)$

$$ Properties: title $($string$),$ author $($string$),$ price $($float$),$ quantity $($integer$),$ and type

$($one of multiple book types: $$Fiction$,$Non$-$Fiction$,$Sci$-$Fi$,$Mystery$,$ and $$Biography$)$

$$ Getters: getTitle$(),$ getAuthor$(),$ getPrice$(),$ getQuantity$(),$ getType$()$

$$ Setters: setPrice$($newPrice$),$ setQuantity$($newQuantity$)$

$$ Methods: A $\_\_$repr$\_\_$ method that displays information about the book

User $($class$)$

$$ Properties: username $($string$),$ email $($string$),$ and password $($string$)$

$$ Getters: getUsername$(),$ getEmail$()$

$$ Setters: setEmail$($newEmail$),$ setPassword$($newPassword$)$

$$ Methods: A $\_\_$repr$\_\_$ method that displays information about the user

Order $($class$)$

$$ Properties: order$\_$id $($string$),$ user $($User object$),$ book $($Book object$),$ and quantity

$($integer$)$

$$ Getters: getOrderId$(),$ getBook$(),$ getQuantity$()$

$$ Setters: setQuantity$($newQuantity$)$

$$ Methods: A $\_\_$repr$\_\_$ method that displays information about the order get the user input