Title: Countdown to Final Crisis
Content:  Countdown, also known as Countdown to Final Crisis for its last 24 issues based on the cover, was a comic book limited series published by DC Comics. It debuted on May 9, 2007, directly following the conclusion of the last issue of 52. The series is written primarily by Paul Dini, along with a rotating team of writers and artists. Countdown consists of 51 issues, number in reverse, published weekly for one year, crossing over with noteworthy and significant titles published by DC. The series covers much of the fictional DC Universe, told in parallel narratives, through the interconnecting stories of a cast of characters, and frequently crosses over with various other DC titles. Unlike the 52 limited series of the previous year, Countdown is not depicted as taking place in "real time" but presumably operates on the same floating timeline as DC Comics stories in general.
Title: Countdown to Final Crisis
Content:  the prologue to the Final Crisis limited series. Instead, it was decided that Countdown would conclude with issue #1 and the #0 issue was retitled to DC Universe #0. DC Universe #0 was co-written by Grant Morrison and Geoff Johns and served as a summary of recent events within the DC Universe in order to attract new readers before the company launched the Final Crisis limited series. While the book was billed as leading up to the beginning of DC's Final Crisis limited series, it later emerged that the plotlines in Countdown had diverged from what was written for Final Crisis, 
Title: Countdown to Final Crisis
Content:  In 2010 GraphicAudio produced an audiobook based on Countdown, written by Greg Cox. It runs for 8 hours. It excludes the plots of: Karate Kid and Triplicate Girl, the Morticoccus, Trickster and Pied Piper, Ryan Choi, Monarch, Superboy-Prime, Kyle Rayner, Duela Dent, Belthera, Klarion, Steel, Kamandi and Brother Eye, as well as other elements, such as merging Monitors Bob and Solomon into one being, omitting the destruction of Earth-51 and having the Infinity Man battling Darkseid in the final battle instead of Orion.
Title: Final Crisis
Content:  the impression there would be at least one additional major follow-up to the original Crisis on Infinite Earths. A May 2007 teaser poster confirmed this speculation with the tagline: "Heroes die. Legends live forever." Final Crisis was preceded by Countdown, a year-long weekly series which was meant as a follow-up to 52. Halfway through, the series was renamed Countdown to Final Crisis. However, the artwork met with delays. To keep the release on schedule, Countdown wrapped with issue #1 and its planned final issue (#0) was revamped as a 50 cent one-shot special called DC Universe #0. Besides hyping upcoming storylines such as "Batman R.I.P." and "Blackest Night," the issue was 
Title: Final Crisis
Content:  Final Crisis is a crossover storyline that appeared in comic books published by DC Comics in 2008, primarily the seven-issue miniseries of the same name written by Grant Morrison. Originally DC announced the project as being illustrated solely by J. G. Jones; artists Carlos Pacheco, Marco Rudy and Doug Mahnke later provided art for the series. The storyline directly follows DC Universe #0 after the conclusion of the 51-issue Countdown to Final Crisis weekly limited series. Promotion about the limited series describes its story as "the day evil won". The series deals with alien villain Darkseid's plot to overthrow reality, and the subsequent death and corruption of various DC characters and their universe.
Title: Countdown to Infinite Crisis
Content:  DC Countdown, commonly referred to as Countdown to Infinite Crisis, is a one-shot publication and the official start of the "Infinite Crisis" storyline. It was released 30 March 2005, sold out, and quickly went to a second printing. When this comic was first published, the cover showed Batman holding a shadowed corpse, so as not to ruin the surprise of who dies. For the second printing, the shadows were removed to reveal the identity of the corpse. During initial solicitations the comic was entitled DC Countdown to postpone revelation of an upcoming crisis. Countdown was a special 80 page comic originally priced at $1, much lower than would normally be the case for an 80-page comic, although the second printing was priced at $2. The script was co-written by Geoff Johns, Greg Rucka, and Judd Winick, while the art chores were divided up, generally on a chapter by chapter basis, between the penciller-inker teams of Rags Morales & Michael Bair, Jesus Saiz & Jimmy Palmiotti, Ivan Reis & Marc Campos, and Phil Jimenez & Andy Lanning. Artist Ed Benes pencilled and inked his chapter.
Title: Countdown to Final Crisis
Content: Volume 1 (collects #51-39, 296 pages, May 2008, ISBN: 1-4012-1789-3) ; Volume 2 (collects #38-26, 296 pages, July 2008, ISBN: 1-4012-1824-5) ; Volume 3 (collects #25-13, 296 pages, October 2008, ISBN: 1-4012-1911-X) ; Volume 4 (collects #12-1, 272 pages, November 2008, ISBN: 1-4012-1912-8) Countdown: Arena #1-4 (168 pages, August 2008, DC Comics, ISBN: 1-4012-1822-9, Titan Books, ISBN: 1-84576-867-1) ; Countdown to Adventure #1-8 (192 pages, August 2008, DC Comics, ISBN: 1-4012-1823-7, Titan Books, ISBN: 1-84576-866-3) ; Countdown to Mystery #1-8 (160 pages, September 2008, DC Comics, ISBN: 1-84576-866-3) ; Countdown Presents: The Search for Ray Palmer Crime Society #1; Gotham by Gaslight #1; Red Rain #1; Red Son #1; Superwoman/Batwoman #1; Wildstorm #1 (168 pages, 
Title: Countdown to Infinite Crisis
Content:  Countdown was reprinted as part of the trade paperback collection of The OMAC Project, published November 2005 (ISBN: 1-4012-0837-1).
Title: Countdown to Final Crisis
Content:  to continuity problems between the two books, as noted by Final Crisis author Grant Morrison. Much of the comic has subsequently been retconned out of continuity, along with Death of the New Gods. Jimmy Olsen learning Superman's secret identity, the battle between him and Darkseid, and other such events have been ignored following the conclusion of the series. During a DC Nation panel at the 2008 San Diego Comic Con, DC Editor-in-Chief Dan DiDio invited fans to give their own opinions on "what went wrong" with Countdown. DiDio had reportedly described the series (prior to its release) as "52 done right."
Title: Final Crisis
Content:  paperback, February 2010, ISBN: 1-4012-2605-1) ; Final Crisis Aftermath: Escape (collects Final Crisis Aftermath: Escape #1–6, 144 pages, paperback, March 2010, ISBN: 1-4012-2608-6) ; Final Crisis Aftermath: Ink (collects Final Crisis Aftermath: Ink #1–6, 144 pages, paperback, March 2010, ISBN: 1-4012-2607-8) ; Final Crisis Aftermath: Run (collects Final Crisis Aftermath: Run #1–6, 144 pages, paperback, March 2010, ISBN: 1-4012-2606-X) The series has been collected into a single volume (an expanded new edition was released in 2014): In 2012 the series was also collected as a DC Comics Absolute Edition. In addition, ancillary titles have also been collected: Lastly, Final Crisis Aftermath titles have also been collected:

Question: Who is the author of Countdown to Final Crisis?
Answer: Adam Beechen.