Diana Kander has created a real gem of a book for someone like myself teaching entrepreneurship at the post-grad level at the School of Visual Arts (SVA) in NYC. I am a serial entrepreneur and had adopted Steve Blank and Bob Dorf's Startup Owner's Manual for my master's level students in the MFA in Design for Social Innovation program. I had used it previously for the text for teams in my accelerator program at Lean Launch Ventures in partnership with Connecticut Innovations, the VC arm of the State of CT. Diana's observation was that books like the Startup Owner's Manual are good but the lessons don't necessarily stick. I wasn't sure at first but once I began to read the book myself, after donating to Diana's Indiegogo campaign I was overwhelmed by how well All In Startup drove home the most important message that I try to teach my students, how to do customer validation.