"handbook of fixed income securities" by frank fabozzi
"fixed income securities" by bruce tuckman,
both pretty elementary background reading, not for trading strategies.
of course you can trade bonds like any other commodity, but there's a wrinkle called yield curve you don't find in stocks.
i have rarely seen a TA book on the yield curve, but there are plenty of academic papers.
for trading strategies check out:
Fixed-Income Arbitrage: Analytical Techniques and Strategies
by M. Anthony Wong
The Treasury Bond Basis: An In Depth Analysis for Hedgers, Speculators and Arbitrageurs
by Galen D. Burghardt, Terrence M. Belton, Terry Belton
you might pick up some ideas here