I want to get my kids a couple of graphic novels for Christmas that gives them the main stories for Age of Ultron, Infinity Gauntlet, and Civil War. I was planning to get them the 3 main graphic novels with those titles, but there are others out there (like "Road to Civil War" or "Thanos: the Infinity Revelation").
What should I get for them to give them enough information to have the main story while leaving plenty of avenues to explore if they are interested in reading more tie-ins?
Bear in mind they have no exposure to comics other than the MCU movies which have been released. Both are into Agents of Shield though as well, and both have expressed a desire to read the source material based on speculation of what's coming.