I would like to expand my knowledge on systematic strategies in fixed income. I know there are a lot of articles on equity but these markets are different and I would like to know more. Are there good summary books or summary papers? Mainly interested in corp bonds, options, FX.
AQR Capital Management has a number of good papers on the general topic of systematic investing. In particular, you might find "Systematic Credit Investing" by Frieda and Richardson (easy to find on the Internet) interesting; it addresses both corporate bonds (investment grade/high yield) and CDS.
In addition to the other answer, many of the risk & analytics vendors sell factor based fixed income risk models which can be used in systematic ways.