' Harkness ' ` ` All Souls Trilogy '' has sold more than a million copies . Harkness is a visiting professor at the University of Southern California . ` ` The Book of Life '' came out July 2017 . Falling in love is really relatively easy , compared to staying in love and building a family that lasts . Harkness ' academic publications include : ` ` The Jewel House : Elizabethan England and the Industrial Revolution ''
' Harkness ' ` ` All Souls Trilogy '' has sold more than a million copies . Harkness is a visiting professor at the University of Southern California . ` ` The Book of Life '' came out July 2017 . Harkness ' academic publications include : ` ` The Jewel House : Elizabethan England and the Industrial Revolution ''