The third and final instalment in this thrilling trilogy, following T'Challa through his early years before he becomes the Wakandan hero, Black Panther

A delightfully creepy novel from a Coretta Scott King/John Steptoe New Talent Award winner imbued with magic and seafaring mythology. Lemony Snicket and Jessica Townsend meet Greenglass House, with a hint of Edward Gorey thrown in. \When twelve-year-old Rory applies for a job at a spooky old mansion in his gloomy seaside town, he finds the owner, Lord Foxglove, odd and unpleasant. But he and his mom need the money, so he takes the job anyway. Rory soon finds out that his new boss is not just strange, he's not even human--and he's trying to steal the townspeople's shadows. Together, Rory and his friend Isabella set out to uncover exactly what Foxglove and his otherworldly accomplices are planning and devise a strategy to defeat them. But can two kids defeat a group of ancient evil beings who are determined to take over the world? Another delightfully creepy tale from Coretta Scott King/John Steptoe New Talent Award-winning author Ronald L. Smith.

In the second installment of the Young Prince series, follow T'Challa in an action-packed adventure as he tries to unravel a sinister plot

Matrix positivity is a central topic in matrix theory: properties that generalize the notion of positivity to matrices arose from a large variety of applications, and many have also taken on notable theoretical significance, either because they are natural or unifying. This is the first book to provide a comprehensive and up-to-date reference of important material on matrix positivity classes, their properties, and their relations. The matrix classes emphasized in this book include the classes of semipositive matrices, P-matrices, inverse M-matrices, and copositive matrices. This self-contained reference will be useful to a large variety of mathematicians, engineers, and social scientists, as well as graduate students. The generalizations of positivity and the connections observed provide a unique perspective, along with theoretical insight into applications and future challenges. Direct applications can be found in data analysis, differential equations, mathematical programming, computational complexity, models of the economy, population biology, dynamical systems and control theory.

Soon she is plunged into the dark world of Victorian London's supernatural underbelly and learns that the city is under attack by ghouls, monsters, and spirit summoners. Can Jess fight these powerful forces? And will the group of strange children with mysterious powers she befriends be able to help? As shy, proper Jess transforms into a brave warrior, she uncovers terrifying truths about the hidden battle between good and evil, about her family, and about herself.