React (from Spanish: Reacciona) is a book by Rosa María Artal published in Spain in 2011 by Aguilar, which compiles articles by José Luis Sampedro, Baltasar Garzón, Federico Mayor Zaragoza, Javier Pérez de Albéniz, Javier López Facal, Carlos Martínez Alonso, Ignacio Escolar, Rosa María Artal, Àngels Martínez Castells, Juan Torres Lopez and Lourdes Lucia.

The book was written with the intention of raising awareness to the dangers that societies currently face and calls for action, participation and discourages resignation.

Society is playing to its strength, stability and balance, especially in a generation of young people who are denied dignity, a future and a present.

The 10 authors, all from different disciplines, offer their answers to an idea that unites them: the need to position themselves and to act, to become aware and react.

For the authors, it is necessary that the public is informed and can take action to prevent abuses of the financial, economic and political institutions which are responsible for the crisis.