The Amazing Adventures of Kavalier & Clay

I'm not even sure how to describe this book. It is at the same time a love letter to comics, a sad story about WW2, an epic about the life of very singular and intense characters, a story about family values and relationships and do much more.
The book is big and you need to take your time with it. A lot of work has gone in this book to create such an exciting universe, so will depicted in vivid details.
It is rare to encounter such a complete masterpiece that is also extremely polished and easy to consume, because among other things this book is a lesson of writing style.