Gordons Sunday Lunch book is pretty good and actually quite straight forward to follow - would recommend.
Also have loads of other books too;
Al of Nigellas - and do quite a bit from all of them (even have a Limited edition signed copy of Express - does that take the ?
Use most of them quite regulary - but a few in DG have pencil scriblings, often find too much toppings say for cakes, also check her website as there are some published erors (flapjack is wrong amount of syrup).
Quite a few Gary Rhodes too - but these are generally more involved but get good results if you follow through with care.
RiverCafe - got these, read them but not actually make that many - not sure why.
Jamie - generally good range, although a few recipes seem to appear in similar guises in later books (as does Nigella). Good day to day stuff but not that much special.
Delia - yep you can't beat a bit of Delia for precision can't go wrong stuff!
Moro - these are great books (3) and something a bit different for Morrocan / Spanish type stuff.
Curry books - have a few too - Madhur and a few others.
HFW - Riverside Cottage - done a few there too.
Looking at an old 1969 copy of Dairy Cook yesterday when thinking about buying a real tongue to cook up - opions divided amongst the DS' on the subject!
A few other odds and sods too when I see them cheap usually.
If I had to pick one.......no sorry can't decide but go ahead and flick through a few and why limited yourself to just one! Some are more gastro porn than others.