War of will.

Everyone named will in the universe is fighting, in a humorous and humongous war, which also happens to take place on the moon.
A boy named, you guessed it, will, teams up with a horse to win. Will they make it? Will they die a horrible death? Will there be lots of puns related to the name will? Will this be quite confusing because everyone is named will? Will I answer these questions in the book? (Yes, the questions will be answered if you read the book) .