That is a fairly open ended question, and I am not sure exactly how to answer it. Any solid biochemistry textbook (Nelson and Cox, Miesfield and McEvoy) will cover the major biosynthetic pathways in mammals and in E. coli. However, most biochemistry textbooks have only one or two chapters on plants. They don't cover secondary metabolites, which I suspect is what you are most interested in. Possibly a plant biochemistry textbook would be a start.