Iron Man's fate varies in different Marvel Comics story arcs. But in certain ones, unfortunately, he does die. It often depends on the creative direction and plot developments.
It could be Midoriya. Imagine Midoriya getting access to Iron Man's technology. He's already a determined and intelligent hero - in - training, and with Iron Man's tech, he could become even more powerful. He might struggle at first to adapt to the new technology, but his strong will would drive him to master it and use it to protect others in new and exciting ways.
A cool plot could be that a villain in the Boku no hero world steals Iron Man's technology and starts creating chaos. The heroes then have to figure out how to stop the villain while also dealing with the unfamiliar technology. Or perhaps a young inventor in the Boku no hero world idolizes Iron Man and tries to recreate his suits, but with a twist related to quirks. This could lead to a story about the young inventor's journey, from being an unknown to becoming a key figure in fighting crime with their unique Iron Man - inspired creations.
Maybe there's a story where Iron Man and Ms. Marvel team up to face a new, powerful villain who is causing chaos across the globe. They could combine their different powers and skills - Iron Man's technological prowess and Ms. Marvel's shape - shifting and energy - projection abilities - to take down the bad guy.
It depends on the specific 'Marvel Iron Man novel'. Some may be more suitable for young readers as they might focus on the heroic aspects of Iron Man, with less complex storylines and minimal violence. However, others could be more aimed at older audiences with more intricate plots and perhaps some darker themes.
Iron Man died sacrificing himself to save the universe. He used the power of the Infinity Stones to defeat Thanos, but the energy blast was too much for him to survive.