Best-selling author of The Truth About the Harry Québert Affair and The Book of Baltimore, winner of the Grand Prix of the French Academy and the Goncourt Lyceum Prize, Joel Dicker was still considered the "most American" of European writers. However, in "Riddle Number 622" he surprised everyone by choosing his homeland, Switzerland, as the scene of the book for the first time. The local flavor here is not just a background - the plot for the plot was a "purely Swiss" murder.