A very special type of polysquare puzzles is the set of 'square-puzzles', where all given shapes are squares with integral sidelength.
Reference
... Union[?] (+ 1980) February 25 - Adelle Davis[?], nutritionist, writer (+ 1974) February 29 - Jimmy Dorsey, bandleader (+ 1957) March 1 - Glenn Miller, bandleader (+ ...