5 on AP Comparative Government with Ethel Wood?

I saw people talking about doing well on AP Comparative Government by just reading this one book. If I wanted to self study it (my school doesn’t have the class) should I self-study it after taking other history classes such as AP US Government or could I still do well by reading the book with no other background in AP history classes?

I would recommend Introducing Comparative Politics: Concepts and Cases in Context, Third Edition in addition to that Ethel Wood. It has helped me better understand some concepts of the course

is this the Ethel Wood book?

http://www.amazon.com/Comparative-Government-Politics-Essential-Coursebook/dp/0983176698/ref=lh_ni_t?ie=UTF8&psc=1&smid=ATVPDKIKX0DER