title: Data Structure for Library Management Project
body: <p>Which Data Structure should be used for a Library Management Project?</p>
  
  <p>There are 5 operations:</p>
  
  <ul>
  <li>Buy a book</li>
  <li>Buy a new copy of a book</li>
  <li>Rent a book</li>
  <li>Return back a book</li>
  <li>delete a copy of a book</li>
  </ul>
  
  <p>I know Hash Tables and AVL-Trees at the moment.</p>
  
  <p>I started my project with AVL, but I am not sure if it's the right choice.</p>