What happens in the end of the story The BFG?

Starting in chapter 21, Sophie, the BFG, and the military travel into giant country. The goal is for the soldiers to tie up and immobilize all of the terrible people eating giants. They successfully accomplish this goal and then transport all of these giants back to England and place them in a large, deep pit. The BFG gives the royal gardener seeds from a snozzcumber, so that all of the captured giants will have a disgusting food supply.
After this, the Queen of England makes the BFG the "Royal Dreamblower." She also has a giant sized house built for him with a regular sized house for Sophie nearby. As book closes, readers find out that the BFG learned to write and that he was the person that actually wrote the book that readers have been reading.