Gary Mavko is Professor Emeritus at the Department of Geophysics, Stanford University, California. He was awarded Honorary Membership by the Society of Exploration Geophysicists (SEG) in 2001, was named the spring SEG Distinguished Lecturer in 2006, and shared the ENI medal for New Frontiers in Hydrocarbons in 2014. He is also co-author of Quantitative Seismic Interpretation (Cambridge, 2005). Tapan Mukerji is Professor at the Department of Energy Resources Engineering, Stanford University, California. He received the Society of Exploration Geophysicists (SEG)'s Karcher Award in 2000, and shared the 2014 ENI award for pioneering innovations in theoretical and practical rock physics for seismic reservoir characterisation. He is also co-author of Quantitative Seismic Interpretation (Cambridge, 2005) and Value of Information in the Earth Sciences (Cambridge, 2015). Jack Dvorkin is Research Fellow and Program leader at King Fahd University of Petroleum and Minerals, Saudi Arabia. He was awarded honorary membership by the Society of Exploration Geophysicists (SEG) in 2014, and shared the 2014 ENI medal for 'New Frontiers in Hydrocarbons'. He is also co-author of Seismic Reflections of Rock Properties (Cambridge, 2014).