Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good reference

Ok, so Fabozzi is the ultimate in reference material and general fixed income awareness. The book is good, it provides most of what you need to understand fixed income valuations, particularly essential bond pricing. However, the book really serves well mostly as a reference. There are few true explanations of formulas. With a little effort you can figure out the derivations yourself, but still, is not the point of buying a book with "mathematics" in the title to have something to guide you through that step? Again, worth having, but not the ultimate to explain the nitty gritty, though not sure that that text exists.