What is the last name of the author of A Whole New MInd?

If you think it's...

1. GREEN: You don't have to go on a route quite like that of The Motorcycle Diaries, but text Oana the author's name to obtain the location of your next destination.
2. BEDFORD: If men are from Mars, where are women from? (Yup, it also has to do with the title of a book). Text the answer to Oana.
3. ALEXANDER: How well do you know your way around Northern California--basically, can you match the skills of Mr. Alexander? Find the local spot mentioned on page 73 of his book to find your next destination. Once you find it, go tell it to the barista at the Borders Cafe to get your next clue.
4. PINK: What do white people like? (Not sure you know? There's a book that claims to; in fact, the 48th thing it says white people like is the location of your next destination). Once you find it, go tell it to the barista at the Borders Cafe to get your next clue.
5. SMITH: It's not Smith. Go back and look again.