Well I find the stuff in Organic Chemistry by Clayden, Greeves, Warren and Wothers really fascinating and it'll get you really into chemistry, but it won't be that relevant to GCSE chemistry (assuming you're from Bristol, UK), but it may help with AS and A-Level chem. I found the CGP revision books good for GCSE. Try
Amazon for books relevant to your syllabus, and look for good reviews.