Thank you for this book. It's the best book I read all year about figuring out if the thing you're building is a complete waste if time or actually solves a real need.

I used its guidance at my big tech job when trying to build a new tool for researchers, and it helped me better understand how to understand what they need, iterate, and better tailor the sales pitch afterwards. Who would have thought that talking to customers is the single most valuable thing you can do!