In April, more comic book retailers in North America ordered copies of the ongoing series of The Immortal Hulk, than they did of Batman. This is the first time that an ongoing series has beaten Batman two months in a row that I can recall. Previously it's only been high profile event mini-series, from Doomsday Clock to The Batman Who Laughs to Metal, or anniversary issues such as Amazing Spider-Man #800. But this isn't the case for Immortal Hulk by Al Ewing, Joe Bennett and Paul Mounts who have built sales upon sales upon sales over one-and-a-half yearsand giving Marvel Comics a success story they could never have anticipated.

Last month's issues orders were dismissed by some as reflecting a very fine tiered cover, one copy available to retailers for every 25 copies they ordered, bumping the numbers. But twice in a month is less easy to dismiss.

Amazing Spider-Man also gets an issue over Batman, courtesy of its Hunted event storyline and added discount from Marvel to retailers , but the subsequent issue was ordered with fewer copies. And, yes, Batman, like Amazing Spider-Man, is twice-monthly – but that won't be true for 2020…

Here are those top tens again.

TOP 10 COMIC BOOKS BY UNITS SHIPPED

RANK DESCRIPTION PRICE ITEM CODE VENDOR 1 DCEASED #1 $3.99 MAR190464-M DC 2 DOOMSDAY CLOCK #10 $4.99 JAN190585-M DC 3 BATMAN: LAST KNIGHT ON EARTH #1 (MR) $5.99 MAR190458-M DC 4 SAVAGE AVENGERS #1 $4.99 MAR190757-M MAR 5 THE BATMAN WHO LAUGHS #5 $4.99 MAR190495-M DC 6 AMAZING SPIDER-MAN #21 $3.99 MAR190831-M MAR 7 THE IMMORTAL HULK #17 $3.99 MAR190845-M MAR 8 BATMAN #70 $3.99 MAR190487-M DC 9 BATMAN #71 $3.99 MAR190489-M DC 10 AMAZING SPIDER-MAN #22 $3.99 MAR190835-M MAR

TOP 10 COMIC BOOKS BY DOLLARS INVOICED

RANK DESCRIPTION PRICE ITEM CODE VENDOR 1 DCEASED #1 $3.99 MAR190464-M DC 2 BATMAN: LAST KNIGHT ON EARTH #1 (MR) $5.99 MAR190458-M DC 3 DOOMSDAY CLOCK #10 $4.99 JAN190585-M DC 4 THE BATMAN WHO LAUGHS #5 $4.99 MAR190495-M DC 5 SAVAGE AVENGERS #1 $4.99 MAR190757-M MAR 6 THE IMMORTAL HULK #17 $3.99 MAR190845-M MAR 7 AMAZING SPIDER-MAN #21 $3.99 MAR190831-M MAR 8 WAR OF REALMS #3 $4.99 MAR190765-M MAR 9 WAR OF REALMS #4 $4.99 MAR190773-M MAR 10 BATMAN #70 $3.99 MAR190487-M DC