Malachi is the last of the minor prophets as well as being the last book in the King James Old Testament.
He isn't any more pleasant then the previous 11 minor prophets and is actually fairly graphic in his descriptions of God's wrath.
2:3 Behold, I will corrupt your seed, and spread dung upon your faces, even the dung of your solemn feasts; and one shall take you away with it.
God (actually, the priests in charge) demands money and food;
We finally make it to the end of the Old Testament. I wish I had some profound words but it's more like feeling exhausted when you cross the finish line in a race, you're just glad it's over.
Having read the Gospel of Matthew before, I know it's a MUCH more pleasant book and a lot of positive messages for the reader. :-)