Yes, the Endgame Manual is very good.
Unfortunately, none of Dvoretsky's other books are anywhere near as accessible. I have several of them and they contain a lot of good stuff, but they're hard going. Some of the exercises are incredibly difficult and even grandmasters have been known to struggle with them. That's because Dvoretsky picked these exercises to challenge his best pupils, who were exceptionally gifted players.
I wouldn't recommend them to anyone unless they're prepared to work very hard on the exercises. By the way, he almost never uses the standard kind of positions you see in newspapers. You won't see any 'White to play and mate in X moves' combinations. Instead a typical problem would be to decide which piece to exchange in a quiet middlegame position, so that a better endgame is achieved 20 moves later!
So don't buy unless you really determined to improve your chess and have plenty of spare time to work through the exercises.
Edit - I haven't seen some of Dvoretsky's more recent books. So maybe they are a bit easier as Wulebgr states. I'll have to check them out!