You're welcome, Batmil. I really hope that whoever ends up doing the Doom movie does the character justice this time. I have confidence in Kevin Feige putting together the right combination of casting, script and director/producer. The Russo brothers are very interested in doing something with Doom. But most likely that is at least 3 - 5 years down the line. Marvel Studios has other projects schedule and the Russo brothers are taking a bit of a break from the MCU to work on other projects.
As to other "Books of Doom", I'm going to go way back to the Stan Lee/Jack Kirby era. I don't think anyone would question that Stan and Jack are the co-architects of the character. His early appearance prior to Fantastic Four annual #2 are a bit inconsistent. There is no indication that Doom is anything but an American. He even tries to force JFK into making him a member of his cabinet. (Fantastic Four #17) You can check out those early issues, particularly if you join the Marvel Unlimited. They have frequent one month trial subscriptions and I think Comixology is running one now.
FF annual #2 is where Stan and Jack really get into the business of giving Doom a proper origin so I would say you should check that out. Before the digital age, that was like the Doom Holy Grail got me because it was difficult to find. Comic shops in my area didn't always have a deep back issue stock. But I eventually found one.
I'd also check out the Doom solo's of the Silver Age and that would be Astonishing Tales and Super-Villian Team Up. Again, the quality is inconsistent but I'd check out all the issues anyway. I'd say the better SVTU issues are done by Bill Mantlo. For Astonishing Tales, the best issues IMO are the last 2 written by Gerry Conway (who was only about 19 at the time) and the late great Gene Colan. This would be issues #7 and #8. Issue #8 is a little jewel of a story done by them called Though Some Call it Magic and is the inspiration for the Triumph and Torment GN by Roger Stern and Mike Mignola
Stan and Jack's run has 3 more Doom arcs after the origin. They would be FF #39-40 where the FF have lost the powers and have to face a ticked off Doom who's looking for some payback from a trick Reed played on him in the annual. Then there are their final two arcs where Doom steals the powers of the Silver Surfer (#57-60) and the Fantastic Four's mission to Latveria in issues 84-87
The FF run from the end of the Lee/Kirby era has several Doom arcs but the one I like the best has a long build up from around #193 and ends in #200.
I would read anything from from the John Byrne era of the Fantastic Four. I think he does a great job in building Doom back up again after the events of issue #200.
In the middle of this is the original Secret Wars by Jim Shooter. I like how this is a part of building up Doom as someone who fearless steps out of his league to take on these powerful entities of the Marvel Universe.
I'd skip Steve Englehart's Fantastic Four run and go to Walt Simonson's. There's a great Reed vs Doom story in issues #350 and #352 (issue #351 is a filler issue....don't know what happened there)
Another exceptional Doom story is the graphic novel Doctor Strange/Doctor Doom: Triumph and Torment. In a perfect world, this would be a great Doctor Strange film that would introduce us to Doom, even though he is primarily known to comic book fans as the key FF villain. The second Doom GN Emperor Doom by Michelinie and Bob Hall is not in the same caliber but it's a interesting to see their take on how the world would be if Doom were in charge.
The time travel story in Iron Man #149-150 is great fun IMO. Bendis obviously liked this issue a lot because he made several reference to it when Doom appeared in his Mighty Avengers run and later in Infamous Iron Man.
Definitely try out Doom 2099 if you can find some back issues. Unfortunately, Marvel hasn't added it to Marvel Unlimited. The first writer on the series was John Francis Moore. Later some new young British writer named Warren Ellis
come on board in issue #24 His work in collected in a recent TPB.
Well that will take you through to the 1990s at least. But there's more good stuff out there!