Honestly, you’d be doing yourself a great favour if you stayed clear of Revision Guides for A-Levels, especially for the subjects you’re intending to take. A-Levels aren’t like GCSEs, and are much more in-depth. They require a lot more than good memories and what have you.
If you really want to do well at A-Levels, then the best you can do is get some very good textbooks, learn from them, and do plenty of past papers. In the end you’ll find yourself skimming over your textbooks for revision purpose more than your Revision Guides.