Josh Harris wrapped up his Preaching Notes series with Tim Keller, who leads Redeemer Presbyterian Church in New York City and is the author of The Reason For God [audio]. Tullian Tchividjian wrote the introduction for Keller, and you can see Keller’s manuscript here.
They are out of this world. I’ve never seen anyone write in shorthand for their sermon notes like this. In the comment section on Harris’s blog, Keller’s son Michael explained that there is no draft or original version. Keller types it as it is.