What, exactly, is a Product Manager? - Mind the Product https://www.mindtheproduct.com/what-exactly-is-a-product-manager/
Similarly, I’ve always defined product management as the intersection between business, technology and user experience (hint – only a product manager would define themselves in a Venn diagram). A good product manager must be experienced in at least one, passionate about all three, and conversant with practitioners in all..

Linda Hill: How to manage for collective creativity https://www.ted.com/talks/linda_hill_how_to_manage_for_collective_creativity#t-779622
What's the secret to unlocking the creativity hidden inside your daily work, and giving every great idea a chance? Harvard professor Linda Hill, co-author of "Collective Genius," has studied some of the world's most creative companies to come up with a set of tools and tactics to keep great ideas flowing -- from everyone in the company, not just the designated "creatives."

Bill Gross: The single biggest reason why start-ups succeed https://www.ted.com/talks/bill_gross_the_single_biggest_reason_why_start_ups_succeed?language=en
Bill Gross has founded a lot of start-ups, and incubated many others -- and he got curious about why some succeeded and others failed. So he gathered data from hundreds of companies, his own and other people's, and ranked each company on five key factors. He found one factor that stands out from the others -- and surprised even him.