Dissection puzzle

This is easy. A solution is shown to the right.

If you require each of the four pieces to be at least one square, here's another solution.

But thiz puzzle is from a writer whose puzzles are not trivial. He does, however, write puzzle statements with errors in them.

For "Can you find a different way to cut the left-hand shape into four pieces that can be rearranged to form a square",
read "Can you find a different way to cut the left-hand shape into four identical pieces that can be rearranged to form a square".