I want to do Edexcel IGCSE Biology but arent the official books to old? june 2009? Watch
Also, the specification for the Pearson Edexcel International GCSE in Biology (4BI0) has remained pretty constant since 2005ish. The changes from the 2009 specification to the 2011 one are very minimal, and you will be absolutely fine with any book endorsed for the Edexcel IGCSE Biology course, namely the green Pearson ones.