hey,,lets me tell you my story,, i and my friend went to dymock to get some book for year 11...we're gonna get the cambridge book 3 units for sure.but i dont know what should i get for my other subject( chemistry, physic,business).so i decide to get excel just because 1 reason: look not bad,,i mean nice cover.my friend told me not to get because he had readed some review about this book.but i didnt listen to him,,, that was the worst decision of my life,,so one tip to u guys, "alway listen to your best friend".back to my story,,uhm after purchasing those for about $80( chemistry,business studies,physic) about $28 each..i took them home and readed some,,how did i fell when i readed it....SO DISAPPOINTED,,shit information,its not even helpful, cos u dont even nedd it in your assignment or exam,so,,i'm putting those books on ebay now..so excel is not good enough if u wanna get band 5 or 6