The title of this book, Derivative Lives, alludes to the challenge of finding one's way within the contemporary market of virtually limitless information and claims to veracity. Amid this profusion of options, it is easy to feel lost in spaces of uncertainty where biographical truth teeters between the real and the imaginative. The title thus also points to the prolific market of biographical novels that openly and intentionally play in the speculative space between the real and the fictional. Drawing on theories of risk and uncertainty, Derivative Livesconsiders the surge in biofiction in Spain and globally, relating literary expression to concepts such as circumstantiality, derivatives, speculation, and game studies.