First and foremost, I offer thanks and congratulations to Laila Brenner, without whose contribution this book never would have been possible. Laila, you are a joy to work with, and I admire your great writing and unwavering commitment, even while expecting your second child. I look forward to working with you again.

Thanks also to John Wiley & Sons for graciously offering to publish my second book and for being an understanding and flexible partner. I offer a deep bow of humble appreciation to the 121 interviewees and partners who shared their time, insights, and resources, ensuring this book offered truly useful tips and tools for nonprofits and fundraisers, and providing invaluable marketing support around its release. Thanks to my colleagues at Sparrow for their support of this project and for their work helping nonprofits employ the power of mobile technology to better serve the poor. I also want to thank the two other sponsors of this book, Eventbrite and CommitChange, for their invaluable support as well as the Association of Fundraising Professionals for their incredible endorsement, and Social Media for Nonprofits’ Ritu Sharma, for being the catalyst for this project.

I thank my family in Argentina for showing me firsthand how challenging yet rewarding philanthropy can be on a personal level. To the Heyman family, my mishpocheh, thanks for providing me with the support and love I needed to experiment and discover my path. In particular, I’d like to thank my brother for being the best thought partner I could ever ask for and for always being in my corner, even when things get hard. Paulo, you can never lose me. And most of all, I offer gratitude to my mother, Annette. Mom, you taught me how to love and helped me see that, no matter how much I work to change the world, ultimately what really matters is helping one person at a time.