Publishing Chronology went:
Ender's Game Short Story
Ender's Game novel
Speaker for the Dead
Xenocide
Children of the Mind
Ender's Shadow
(other shadow Books)
Ender in Exile
(whatever else has come out)
Speaker for the Dead and Dune are probably my two favorite Sci-fi books, though I've read Ender's Game more than SftD, and Dune more than EG.
It is a great book, and relevant to this board, since Kellhus and Ender are basically identical, although Ender feels remorse when he has to murder those he's caused to love him and loves as well. Ender's the perfect little murderer, all his sins are okay because they are sins of love, or of loving too much. and if they're not sins of love, they're sins of superior intellect, which is even more forgiveable than love. His only failing was when nefarious devil folks withheld crucial information and tricked and deceived him, so his ignorance is only bad because of the actions of other people, his ignorance simply cannot be his own fault, can it? How can you not worship such a god in miniature?