The novel developed from the idea of 'misprints'.
When DNA divides in order to reproduce, that is when errors can creep in. Such transcription errors can lead to mutations, both serendipitous (evolution) and of course pernicious (hereditary diseases). These misprints are in the strings of letters representing the four chemical bases that make up the DNA molecule, A (adenine), G (guanine), C (cytosine) and T (thymine). A single one of these letters being changed for one of the other 3 anywhere along the chain may lead to a genetic mutation.
Before mass printing, books were produced by scribes working writing with quilled ink. For those scribes reproducing the Old and New Testaments, they could not afford a single wrong transcription or the whole volume would be junked. Since the Holy Writ had to be flawlessly reproduced in print, being the word of God.
Perfection was the sole value for the human scribes, erratum was the driving force of genetic evolution.
Our development as infants takes place in a fairly fixed order. One of the first things babies have to learn to do is support their own heads. Then it will be sitting up, then crawling and finally walking. Babies start life only able to consume milk, but when they start taking in solid food, their throat undergoes an anatomical change (sparked by genetic programming) and it is this change in the throat that also allows them to begin the path of acquiring language. Such developments always have to occur in these sequences.
I was interested in the concept of fixed sequences and the novel both portrays them and undermines them as that sequence becomes out of order in the narrative. Just why the narrative is out of order you'll have to find out by reading the novel!