After bailing out of the corporate world, new-media journalist Matthew Buckland built a digital-marketing and media business, Creative Spark, that employed 70+ people and counted top global and local brands as clients. He fulfilled many an entrepreneur's dream when, after five years, he sold his baby for millions to one of the most famous names in global advertising: the listed UK group M&C Saatchi. But a few years later, he was out on his own again with a new venture - and now with an unexpected battle to fight, the biggest of his life. 'So You Want to Build a Startup?' is a frank, refreshing.