Coincidentally, the main reason I visited Singapore was to hang out with Derek. I'll be interested to see the result of your collaboration. P.S. I'm sure it's a

Coincidentally, the main reason I visited Singapore was to hang out with Derek. I'll be interested to see the result of your collaboration. P.S. I'm sure it's a typo, but I love the idea of "go-authoring" a book—it has a great ambitious ring to it.