The Ark Addendum
In addition to the Ark book series, Jim Sorenson has published several Ark Addendums on his blog, featuring character models too trivial to include in the book, or expanded profiles (such as weapon details) which simply could not fit in the print edition.
[edit] The Transformers
File Date
Character models - Chaos aliens November 19, 2008
The Ark Addendum - Megatron's Master Plan December 2, 2008
The Ark Addendum: Day of the Machines December 16, 2008
The Ark Addendum: The Ark II February 3, 2009
The Ark Addendum: Roll For It (part 2) February 10, 2009
The Ark Addendum: Autobot Spike March 3, 2009
The Ark Addendum: City of Steel March 17, 2009
The Ark Addendum: The Master Builders April 21, 2009
The Ark Addendum: S.O.S. Dinobots May 5, 2009
The Ark Addendum: Heavy Metal War May 26, 2009
The Ark Addendum: Galvatron's Transform July 20, 2009
The Ark Addendum: Unicron September 1, 2009
The Ark Addendum: Fire in the Sky September 22, 2009
The Ark Addendum: War of the Dinobots October 13, 2009
The Ark Addendum: Blaster Blues November 3, 2009
The Ark Addendum - Webworld (part 1) November 15, 2009
The Ark Addendum - Webworld (part 2) November 16, 2009
The Ark Addendum - Webworld (part 3) November 17, 2009
The Ark Addendum - Webworld (part 4) November 18, 2009
The Ark Addendum - Webworld (part 5) November 19, 2009
The Ark Addendum - Webworld (part 6) November 24, 2009
The Ark Addendum - Webworld (part 7) December 1, 2009
The Ark Addendum - Webworld (part 8) December 8, 2009
The Ark Addendum - Rodimus Prime's Transformation December 29, 2009
The Ark Addendum - Roll For It (Part 1) January 5, 2010
The Ark Addendum - Roll For It (part 3) January 26, 2010
The Ark Addendum - Incan Ruins February 9, 2010
The Ark Addendum - The Ultimate Doom (part one) March 30, 2010
The Ark Addendum - The Ultimate Doom (part three) April 6, 2010
The Ark Addendum - The Ultimate Doom (part two) April 13, 2010
The Ark Addendum - Autobot City concept art April 20, 2010
The Ark Addendum - Attack of the Autobots (part 1) July 13, 2010
The Ark Addendum - Attack of the Autobots (part 2) July 20, 2010
The Ark Addendum - Dr. Morgan's Lab August 3, 2010
The Ark Addendum - Roll For It (part 4) August 17, 2010
The Ark Addendum - The Ultimate Doom (part four) October 5, 2010
The Ark Addendum - The Ultimate Doom (part five) October 12, 2010
The Ark Addendum - The Ultimate Doom (part six) October 19, 2010
The Ark Addendum - Razorclaw's Transformation November 16, 2010
The Ark Addendum - Divebomb's Transform November 23, 2010
The Ark Addendum - Headstrong's Transform December 7, 2010
The Ark Addendum - Carly and Chip January 4, 2011
The Ark Addendum - Rampage's Transformation January 11, 2011
The Ark Addendum - Tantrum's Transform January 18, 2011
The Ark Addendum - Enter the Nightbird (part 1) February 1, 2011
The Ark Addendum - A Prime Problem February 8, 2011
The Ark Addendum - The Core (part 1) February 15, 2011
The Ark Addendum - Megatron's Master Plan (b) February 22, 2011
The Ark Addendum - The Core (part 2) March 8, 2011
The Ark Addendum - Megatron's Master Plan (c) March 16, 2011
The Ark Addendum - Megatron's Master Plan (d) March 22, 2011
The Ark Addendum - Megatron's Master Plan (e) March 28, 2011
The Ark Addendum - Chaar May 4, 2011
The Ark Addendum - More than Meets the Eye May 18, 2011
The Ark Addendum - Enter the Nightbird (part 2) May 24, 2011
The Ark Addendum - Hound's Holographic Driver June 1, 2011
The Ark Addendum - Desertion of the Dinobots (part 1) June 15, 2011
The Ark Addendum - Desertion of the Dinobots (part 2) June 22, 2011
[edit] The Headmasters
File Date
The Ark Addendum - Fort Max City tf November 25, 2008
The Ark Addendum: Megazarak Transform January 20, 2009
The Ark Addendum: Slugslinger's Transform February 17, 2009
The Ark Addendum: Terror! The Six Shadows March 30, 2009
The Ark Addendum: Vector Sigma Bombs April 7, 2009
The Ark Addendum: Scorponok in Shadows April 14, 2009
The Ark Addendum: Wipe's Transformation May 12, 2009
The Ark Addendum: MegaZarak Transforms (redux) July 7, 2009
The Ark Addendum: The Shadow Emperor, Scorponok July 28, 2009
The Ark Addendum: Planet Sandra September 15, 2009
The Ark Addendum: Hardhead's Transform October 6, 2009
The Ark Addendum - Fort Max Battlestation Transform December 22, 2009
The Ark Addendum - Solar-1 January 19, 2010
The Ark Addendum - Chromedome's Transform February 2, 2010
The Ark Addendum - Sixshot's Transformation (part 1) February 23, 2010
The Ark Addendum - Sixshot's Transformation (part 2) March 9, 2010
The Ark Addendum - Sixshot's Transformation (part 3) March 16, 2010
The Ark Addendum - Planet Sandra shuttle July 28, 2010
The Ark Addendum - Skull's Transform August 10, 2010
The Ark Addendum - Triggerhappy's Transformation September 28, 2010
The Ark Addendum - The Dormant Volcano Mysteriously Erupts (part 1) October 26, 2010
The Ark Addendum - The Dormant Volcano Mysteriously Erupts (part 2) November 2, 2010
The Ark Addendum - Crosshair's Transform March 1, 2011
The Ark Addendum - Brainstorm's Transform June 7, 2011
The Ark Addendum - Shouki's Transform July 12, 2011
The Ark Addendum - Getsui's Transform July 26, 2011
The Ark Addendum - Seizan's Transform August 1, 2011
The Ark Addendum - Suiken Transform August 9, 2011
The Ark Addendum - Yukikaze's Transform August 16, 2011
[edit] Super-God Masterforce
File Date
The Ark Addendum: Cancer's Transform December 9, 2008
The Ark Addendum: Dauros Weapons January 6, 2009
The Ark Addendum: Minerva's Transform March 10, 2009
The Ark Addendum: Ginrai's Transformation March 24, 2009
The Ark Addendum: Bullhorn Transform April 28, 2009
The Ark Addendum: Save the Little Girl! May 19, 2009
The Ark Addendum: Mega and Giga Concepts June 9, 2009
The Ark Addendum: Darkwings Combined July 14, 2009
The Ark Addendum: Ginrai's Interior September 8, 2009
The Ark Addendum: Darkwings' Weapons September 29, 2009
The Ark Addendum: Destron Headmaster Junior Weapons October 20, 2009
The Ark Addendum: Destron Headmaster Junior Weapons redux October 27, 2009
The Ark Addendum - Apache Helicopter December 15, 2009
The Ark Addendum - Road King's Transform January 12, 2010
The Ark Addendum - GoShooter's Transformation February 16, 2010
The Ark Addendum - Metalhawk's weapons June 1, 2010
The Ark Addendum - Goshooter & Cab Extras June 8, 2010
The Ark Addendum - Blood's Transformation June 15, 2010
The Ark Addendum - The Destron Base of Masterforce (part 1) August 24, 2010
The Ark Addendum - The Destron Base of Masterforce (part 2) August 31, 2010
The Ark Addendum - The Destron Base of Masterforce (part 3) September 7, 2010
The Ark Addendum - The Destron Base of Masterforce (part 4) September 14, 2010
The Ark Addendum - The Destron Base of Masterforce (part 5) September 21, 2010
The Ark Addendum - Cab's Transform November 9, 2010
The Ark Addendum - Darkwings' Extras January 26, 2011
The Ark Addendum - Super Ginrai's Transform May 10, 2011
The Ark Addendum - Lightfoot's Transform June 28, 2011
The Ark Addendum - Boeing 757 August 24, 2011
The Ark Addendum - Boeing 747 August 30, 2011
The Ark Addendum - Masterforce flight crew September 6, 2011