DNA is only one small aspect to evolution. This is the definitive book to explore the epigenomic (outside the genome) factors. It's pretty deep in science and technology but well worth reading (especially the last chapter which gets a little philosophical).
Once upon a time I was a staunch believer in the gene-centered view of life. This book managed to challenge and enlarge that view. It argues that there is more to heredity than genes and that some hereditary variations are nonrandom in nature. It further brings forward that some acquired information is inherited and that evolutionary change can result from instruction as well as selection.