The book I'm currently reading, Declare by Tim Powers: "Young Day." (Or "Telephone River" if you skip the prologue and afterword).
The new Jim Butcher book on my bedside shelf: "Winter too."
Simple Socks, Plain and Fancy: "Socks repertoire."
The Golden Compass: "Lyra sky."
The Great Gatsby: "In past."
Last year, I noticed a trend among librarians to designate in their email signatures what they're currently reading. I've started doing that in my work account. I've noticed that it causes me to leave my signature block in place, rather than deleting it and signing with my initials, as I normally do for internal/informal mail. Give it a try. And go read this inspiring, passionate essay about the wonders and importance of reading.