X-link to the Non-Fiction megathread:
2 of Sequart's comic book literary analysis essay collections are
free for a limited time via KDP Select's exclusivity program @ Amazon (should be available worldwide; IIRC, the last time years ago when they gave some of these away, it was only for 2-3 days), for
Daredevil &
Transmetropolitan, respectively.
Sequart were highly recommended way back when by fellow MR member Blue Tyson, who bought their collections in paper copies (and ran a speculative fiction reading blog).