This week on Taking Stock Mandy Johnston takes a deep dive in the business of Michelin Stars with food writer Tom Doorley and asks what a star really means for a restaurant? Mandy talks to the co-author of 'Eavesdropping on Millionaires' to find out what makes those people tick financially and personally. Plus as Ryanair buys houses and planes Mandy talks to Aviation Expert Gerry Byrne.