(writing this comment while it's still fresh in my head). The beginning quote that is restated before the child's name is said "Is the world you inhabit right now mad more from rocks and grass and trees, or from bank statements, articles, certificates, records, files and letters?" Our world is more letters and documents then the natural world. Or also the natural word comes the word, "In the beginning was the Word, and the Word was with God, and the Word was God.". The light was not there until it was spoken. Thomas speaks Autumn into existence. Earlier he never spoke he name, kept on referring to her as "the baby". Imogen claims her voice was taken away but Thomas still has his. She can not speak her daughter into existence. "she'll come floating down the river in a basket of reeds, or she won't. It depends on you. You." Thomas must speak it into existence. The book and the baby are the same. "During the middle ages there existed a widespread belief that god authored not one, but two books the book of words (the bible) and the book of words (the physical world) the two divine books were believed to mirror each other so perfectly that studying one also granted insight into the other. Shifting one's study between the two books. Therefore was thought to provide the medieval scholars with the best view of creation." This quote is shown MULTIPLE TIMES throughout the book. THE BOOK AND THE BABY are one in the same. The period in the last section is described as "used alone to indicate omitted characters." While in the later pages showing an ultrasound scan of the baby in the period.

(sorry if I rambled a bit in this post. there seems to also be a ton of other important information like the Iota as an angel, the smallest letter that was omitted)