Both! If you look through Sargey's posts on this forum you'll see some thoughts about the usefullness of and audience for each book. I've got them all..... as I suspect do many of us
Here's the list:
The Survival Handbook, by Raymond Mears, First book, hard to find and expensive these days, usually going for anything between £25 and £50 on eBay UK. Well worth getting. Apparently has not and will not be re-published
The Outdoor Survival Handook, by Raymond Mears, published in UK and US version but no great difference between them other than one page about maps, get whichever is cheapest. This has been re-published recently, was originally published as The Complete Outdoor Handbook
Bushcraft, by Ray Mears. Big coffee table book format. Again loads of useful info but not rucksack friendly
Essential Bushcraft, by Ray Mears. Pretty much the paperback version of the big book but revised to include more pictures of the gear his own company is selling....