hi ! u try to go through Design Vision user guide. it is a GUI for synopsys Design Compiler. in that synthesis is explained with an example (RISC core). it will help u. then u go through DC user guide once again.
I have only the hard copy of this book
Vhdl: Coding and Logic Synthesis With Synopsys By Weng Fook Lee
if I get ebook I would definitely like to share it here.
If your organization has a licensed software from synopsys, synopsys will also give a CD conatining the features of their products in the form of SOLD documents (pdf versions generally).
Ask your system admin (root) who installed that software.