Ron Baker has been on a crusade to transform accounting firms for decades, first by pushing us to kill the billable hour and to implement value pricing. Today, he’s advising accountants to switch to a radically different business model. His new book, co-authored with Paul Dunn, "Time’s Up! The Subscription Business Model for Professional Firms," explains the subscription model and why moving to this model aligns the values of firm owners with those of their customers.