Liv­ing in Both Worlds is the first-ever book-length his­to­ry of Mod­ern Ortho­doxy, a form of Amer­i­can Judaism that seeks to main­tain tra­di­tion­al Ortho­dox tenets and prac­tices while at the same time par­tic­i­pat­ing in and remain­ing open to the con­tem­po­rary intel­lec­tu­al and cul­tur­al world.