The e-book of The Winds of Change is free to purchase from March 8 to 9, 2014. The e-books of all three parts of the Blades in the Dark trilogy are free to purchase from March 8 to 10, 2014.
Blades in the Dark (paperback): http://smarturl.it/bitdpaperback
The Guardians of Siva (e-book): http://smarturl.it/theguardiansofsiva
Tah Ansenta Mas'plu (e-book): http://smarturl.it/tahansentamasplu
Into the Fire (e-book): http://smarturl.it/intothefire