A fire in a Copenhagen bookstore ignites a relentless hunt across four continents. Commander Gray Pierce dives headlong into a mystery that dates back to Nazi Germany--and to horrific experiments performed in a now-abandoned laboratory buried in a hollowed-out mountain. Meanwhile, madness ravages a monastery in Nepal, as Buddhist monks turn to cannibalism and torture. Lisa Cummings, investigating the atrocity, is suddenly a target of a brutal assassin...

"After saving the world, Charlie is ready to take it easy in the Galapagos Islands. That is, until she's approached by the mysterious Esmeralda Castle, who has a code she knows only Charlie can decipher. In 1835, Charles Darwin diverted his ship's journey so he could spend ten months in South America on a secret solo expedition. When he returned, he carried a treasure that inspired both awe and terror in his crew. Afterward, it vanished, never to...

On a beautiful day, some of Charles Darwin's many children help him study humblebees (bumblebees) in the garden at their home in the English countryside.