What book do the Prince of Wales, the Grand Duke of Luxembourg, Princess Patricia von Hohenberg of Austria, Queen Noor of Jordan and Prince Bernhard of the Netherlands all have in their libraries?

FORBES: Hint: It costs $2,900, and a seabird is the main character.

Queen Margarethe of Denmark, Crown Prince Alexander of Serbia and Princess Katherine, the Grand Duke and Duchess of Luxembourg, King Harald of Norway and Queen Sonia also attended.

BBC: Royal wedding: William greets fans ahead of wedding

Increasingly, attention focuses on Princess Mako, the eldest grand-daughter of Emperor Akihito.

CNN: IN HER OWN RIGHT