Justo Hidalgo is co-founder of 24symbols, a subscription service for ebooks. He teaches Product Strategy, Innovation and Lean Analytics at post-graduate and executive levels, and is a mentor for startups. Prior to 24symbols, Justo was VP Product Management and Consulting at Denodo Technologies, leading worldwide presales and product management. He holds a Ph.D. and an M.S. in Computer Science, and has received training in Product Management, Product Marketing, Innovation and Creativity.