Will Geithner's Book Be Tweet Revenge?

News that former Treasury Secretary Tim Geithner will write a book has prompted lots of chattering on Wall Street and in Washington.

The discussion, however, hasn't centered on whether Geithner will pen a bare-knuckled tell-all (returning fire to such critics as former Federal Deposit Insurance Corp. Chairman Sheila Bair and bailout overseer Neil Barofsky) or a more nuanced, professorial take on his response to the financial crisis (akin to his predecessor, Henry Paulson).