HOT right now: The Last Diva Autographedjohnrademacher left ★★★★★ feedback for deedeebigelow: “DeeDee is the best! She always honors my req…”HOT right now: The Humble Gray Lion (Signed Book)Welcoming Esmee Ditmars to ISO!Southwestconnection Memorabilia just logged their 100th autograph on Graphmasters!Hollywood Grapher and Alex Shant are now friends on RACC!Happy birthday Gillian Jacobs!New Drop just released! The Humble Gray Lion (Signed Book) at Barnes & NobleHOT right now: I've Got You: A Hearts of New York Novel (Signed Book)Liam Dixon is today's Member Signature of the Day!Danny Anhalt holds the crown for Jarhead: Law of Return — Cast on Graphmasters!Indrek Koppel just posted their first Signed Drop!Hollywood Grapher and Adam Halloran are now friends on RACC!fictionjunky left ★ feedback for pieceofhistorycollectibles: “I purchased a Jason Alexander autograph on 8…”XP Autographes holds the crown for De Gaulle: Résistance — Cast on Graphmasters!johntraynor left ★★★★★ feedback for Loa_autographs: “Greg, communication exactly what I wanted au…”Welcoming Joseph Legowski to ISO!Danny Anhalt holds the crown for The Transformers: The Movie — Cast on Graphmasters!emma2005 left ★★★★★ feedback for Loa_autographs: “I loved the autograph I received! Was mailed…”New Drop just released! The Last Diva Autographed at Books-A-MillionNew Drop just released! I've Got You: A Hearts of New York Novel (Signed Book) at Barnes & NobleNew Drop just released! Great Big Beautiful Life (Signed B&N Exclusive Edition) at Barnes & NobleHappy birthday Rebecca Ferguson!Hollywood Grapher and John Rademacher are now friends on RACC!XP Autographes holds the crown for Rocky — Cast on Graphmasters!stoltzfusshay left ★★★★★ feedback for Loa_autographs: “Just got my husband a vintage autograph of N…”XP Autographes holds the crown for Ghost Soldier — Cast on Graphmasters!Justin Steffman holds the crown for The Cat in the Hat — Cast on Graphmasters!Happy birthday Jon Favreau!Happy birthday Katja Herbers!Hollywood Grapher and Randolph Chiang are now friends on RACC!jodeci78 left ★★★★★ feedback for deedeebigelow: “Purchased a bunch of items off Dee Dee at th…”Hollywood Grapher and Luke Harrison are now friends on RACC!RDAutogramme and Adam Halloran are now friends on RACC!
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Marc Guggenheim
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Marc Guggenheim

Comic book writer and television producer (Arrow, The Flash)

Marc Guggenheim is an American comic book writer and television writer-producer. He is known for co-creating or developing series such as Arrow and The Flash and for his comic book work at Marvel and DC.

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