The research is not only on this one, he does this for all his full-lenght books and he keeps the right balance between plausible, novel and interesting. Readi

The research is not only on this one, he does this for all his full-lenght books and he keeps the right balance between plausible, novel and interesting. Reading the author notes about the ideas and what research they are based off is an extra pleasure after finishing one of his books.