I am going to take the Edexcel GCE.
I can find revision guides published by the Exdecel.
Some internet friends recommend me to use letts/cgp for GCE revision guides.
1. What are the differences between them?
2. Which one is more detailed?
3. Which one is more systematic?
4. Any other revision guides by other publishers would you recommend?
5. Among all publishers of GCE revision guides, which is the most popular among elite schools in the UK??
THANKS!