After you find a riddle, you'll have to solve it and find the clue on a hidden object  or a point-and-click scene. Say,in order to "find the book in the dark" as the riddle says, you'll have to find a way to put the lights down in the library and the book will just appear shining in the dark.

More than that, you'll have to earn enough money to allow travelling to remote places. For this sake, you  need to complete puzzle missions(search for hidden objects, put them in place, spot differences between two pictures etc.). Once you have enough money, you can proceed in your quest and travel to a far-away land. 

If you need a hint, just click hint button - and you'll see the playing field will be divided into cells in a manner of  Battleship game. You'll be given the coordinates of the object you need to find. So, all you need is to spot the object in the said cell.

If you ask me if I enjoyed the game, I will say I surely did. Imagine that you start your quest in such significant locations as Capitol, White House and travel to the sacred places of the world.