Orson Scott Card is a fantastic writer and I love all of his books that I've read. Children of the Mind is the fourth and final book in the Ender's Game quartet, which if you haven't read Ender's Game, go to your local library right now! It's amazing, and it took me YEARS to actually read the rest of the quartet even though I've owned all of the books including the Shadow series books since Border's closed in 2011 (oops!)
Now I don't want to ruin the story since this is the final book in the series and all, but I'll just say that the ending was great, I was really happy with it. A short summary to catch you up without giving too much away is that at the end of Ender's Game you see that Ender leaves to go and help other alien species, he finds on which are called Piggies by the human inhabitants, and to very quickly sum up the three books he tries to save the Piggies from the same fate as the Buggers.
Rating: 4.5 out of 5