I am retired now and have been looking for mental stimulation. I found Amazon and the BBC Documentaries, but have also found CGP Revision Guides for many GCSE subjects and this had made a big difference in my experience. I have been going through the GCSE PHYSICS GUIDE and am so pleased with what I have found. It has brought me up to speed with modern technology and scientific research, and the mental stimulation I needed. I can highly recommend these Revision Guides. I have ordered the guides for other subjects I am interested in. Oh Wow!
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