Cuarto volumen de la serie Las Joyas del Templo, precedida por La Estrella Azul, La Rosa de York y El Ópalo de Sissi. En esta serie, Aldo Morosini, príncipe veneciano y anticuario, ha recibido de un misterioso personaje apodado el Cojo de Varsovia el encargo de recuperar las cuatro piedras sustraídas del pectoral del Sumo Sacerdote del Templo de Jerusalén. En esta cuarta parte, El Rubí de Juana la Loca, la búsqueda transcurre en Madrid (Aldo se aloja en el hotel Ritz), Venecia, Praga, un castillo en Bohemia y Zúrich, en una trama histórica plagada de misterios, suspense, traiciones y romances

Just when she had finally moved on… …He moved back. When college freshman Liz Wagner hears her ex's voice for the first time since he moved clear across the freaking country, she does what any respectable girl would do: Dive into the girls' bathroom. Zach Roberts—the Zach Roberts—is back. And he’s everywhere Liz looks—infiltrating her friend group, buddy-buddy with her brother. It’s enough to ruin college altogether. But what choice does she have but to put on a happy face and pretend he didn't leave her vulnerable and alone in a pile of emotional wreckage? Pretending works, until tragedy strikes and the only person available for comfort is the one person she wants to stay away from. When Zach turns out not to be the jerk she convinced herself he was, but the boy she used to love, Liz needs to decide whether to open her heart again to the boy who tore it out

Scientist Peter Bernhardt has dedicated his life to nanotechnology, the science of manipulating matter on the atomic scale. As the founder of Biogineers, he is on the cusp of revolutionizing brain therapies with microscopic nanorobots that will make certain degenerative diseases become a thing of the past. But after his research is stolen by an unknown enemy, seventy thousand people die in Las Vegas in one abominable moment. No one is more horrified than Peter, as this catastrophe sets in motion events that will forever change not only his life but also the course of human evolution. Peter’s company is torn from his grasp as the public clamors for his blood. Desperate, he turns to an old friend, who introduces him to the Phoenix Club, a cabal of the most powerful people in the world. To make himself more valuable to his new colleagues, Peter infuses his brain with experimental technology, exponentially upgrading his mental prowess and transforming him irrevocably. As he’s exposed to unimaginable wealth and influence, Peter’s sense of reality begins to unravel. Do the club members want to help him, or do they just want to claim his technology? What will they do to him once they have their prize? And while he’s already evolved beyond mere humanity, is he advanced enough to take on such formidable enemies and win?