Cheap$kate: The best FREE events in NYC this week

Julianne Moore celebrates the diversity of mothers in her new picture book “My Mom is a Foreigner, But Not Me.” The actress-author reads Monday on the Upper East Side.

Jack Kirby, co-creator of many of your favorite superheroes — Captain America, Thor, The Fantastic Four, Iron Man, X-Men, just to name a few — grew up on the Lower East Side in the early part of the 20th century, so it’s only fitting that a pop-up Kirby Museum would set up shop in the neighborhood this week. Stop by Monday for opening night with Rand Hoppe, Tuesday at 7 p.m. for a talk titled “Jack Kirby and the Auteur Theory of Comics” and Sunday at 5 p.m. for a chat with James Romberger.

Quell that hunger Tuesday with a tasty treat from Pie Face. The Aussie pie shop export is kicking off November with FREE mini chicken and mushroom pies Tuesday, and all it’ll cost you is a tweet with the tag @PieFaceUSA.

Get unplugged with City of the Sun at the W New York — Union Square in the hotel’s first Living Room Unplugged Session.