15.1 Power of Recursion
15.2 Fibonacci Numbers
15.3 Permutations
15.4 Towers of Hanoi
15.5 Mazes
15.6 Sorts
    15.6.1 Divide and Conquer Sorts
        15.6.1.1 Merge sort
        15.6.1.2 Quicksort
15.7 Putting it Together