It depends what you like in caves as to whether you would want the book - not as much vertical as 2/3, but still some good stuff to be had..
From that book I've had some good trips: Goyden, Out Sleets, Birks Fell, Devis, Robinsons, Sleets Gill.. Plus theres other "classics" like- Mossdale, Langcliffe, Langstroth, Stump Cross. I've probably missed off quite a few gems but it gives you a rough idea!
I heard a rumour that there may well be new guide books coming out to replace them, does anyone know if this is true?
Not heard anything about new books recently - last I heard was about 3-4years back, when the chance of new guide books appearing was slim - dalesman has been taken over and finding a publisher willing to take it on was the biggest problem! Back then it was a 50/50 split as to whether people thought enough had been found to warrant new books anyway. A lot has been found since then so it's getting to the point where a new guide of some description would be very useful..