Question: Who wrote a serialied comic about a character that first appeared in "More Fun Comics" #51?

Context paragraphs:
Michael Fleisher: Michael Lawrence "Mike" Fleisher (born November 1, 1942) is an American writer known for his DC Comics of the 1970s and 1980s, particularly for the characters the Spectre and Jonah Hex.

Doctor Fate: Doctor Fate (also known as Fate) is a fictional superhero appearing in American comic books published by DC Comics.  The character has appeared in various incarnations, with Doctor Fate being the name of several different individuals in the DC Universe who are a succession of sorcerers.  The original version of the character was created by writer Gardner Fox and artist Howard Sherman, and first appeared in "More Fun Comics" #55 (May 1940).

Green Arrow: Green Arrow is a fictional superhero who appears in comic books published by DC Comics.  Created by Mortimer Weisinger and designed by George Papp, he first appeared in "More Fun Comics" #73 in November 1941.  His real name is Oliver "Ollie" Queen, a billionaire businessman and owner of Queen Industries who is also a well-known celebrity in Star City.  Sometimes shown dressed like Robin Hood, Green Arrow is an archer who uses his skills to fight crime in his home cities of Star City and Seattle, as well as alongside his fellow superheroes as a member of the Justice League.  Though much less frequently used in modern stories, he also deploys a range of trick arrows with various special functions, such as glue, explosive-tipped, grappling hook, flash grenade, tear gas and even kryptonite arrows for use in a range of special situations.  At the time of his debut, Green Arrow functioned in many ways as an archery-themed analogue of the very popular Batman character, but writers at DC subsequently developed him into a voice of left-wing politics very much distinct in character from Batman.

Spectre (character): The Spectre is the name given to several fictional superhero characters who have appeared in numerous comic books published by DC Comics.  The character first appeared in a next-issue ad in "More Fun Comics" #51 (Jan. 1940) and received his first story the following month, #52 (February 1940).  He was created by Jerry Siegel and Bernard Baily, although several sources attribute creator credit solely to Siegel, limiting Baily to being merely the artist assigned to the feature.

Johnny Quick (Johnny Chambers): Johnny Quick is a Golden Age DC Comics character with the power of superhuman speed.  He was a superhero who appeared mostly in "More Fun Comics" during the Golden Age.  In the 1980s Johnny Quick's adventures were reconnected into the reality of DC Comics' Earth-Two; this was done in the pages of the comic book the "All-Star Squadron".

Superboy (Kal-El): Superboy is a fictional superhero that appears in American comic books published by DC Comics.  The character was created by Jerry Siegel and Don Cameron and is based on the character of Superman that Siegel co-created with Joe Shuster.  Superboy first appeared in the comic book "More Fun Comics #101" in 1945.

Lords of Chaos and Order: The Lords of Chaos" and "Lords of Order are complementary groups of supernatural entities with godlike powers that appear in DC Comics.  They have also been retconned into the histories of Amethyst, Princess of Gemworld, Doctor Fate, Kid Eternity, the Phantom Stranger, Shazam, Hawk and Dove and The Sandman.  The first Lord of Order to appear in comics was Nabu in "More Fun Comics" #67 (May 1941) created by Gardner Fox and Howard Sherman.  Nabu's first appearance was later retconned to be in "More Fun Comics" #55 (May, 1940), where he was inside the helmet, though not explicitly stated in the story.  However, the concept of the Lords of Chaos and Order was introduced years later.  The term never appears in Golden Age stories.

Rose Psychic: Rose Psychic is a DC Comics heroine affiliated with the company's first superhero, Doctor Occult.  They were created by Jerry Siegel and Joe Shuster, the creators of Superman.  She first appeared in "More Fun Comics" #6 (October 1935).  She appeared in Dr. Occult's first story, and then disappears from the story until 1938.  After Dr. Occult's original stories ended in late 1938, Rose did not appear again for more than fifty years.

More Fun Comics: More Fun Comics, originally titled New Fun: The Big Comic Magazine a.k.a. New Fun Comics, was a 1935–1947 American comic book anthology that introduced several major superhero characters and was the first American comic-book series to feature solely original material rather than reprints of newspaper comic strips.  It was also the first publication of the company that would become DC Comics.

Congorilla: Congorilla, originally a human character known as Congo Bill, is a superhero appearing in comic books published by DC Comics and Vertigo Comics.  Originally co-created by writer Whitney Ellsworth and artist George Papp, he was later transformed into Congorilla by Robert Bernstein and Howard Sherman.  The character first appeared in "More Fun Comics" #56 (June 1940).

Supporting paragraphs: Michael Fleisher Spectre (character)
Answer: Michael Lawrence "Mike" Fleisher