Cath Senker is a children's non-fiction writer who specialises in writing about modern history, global issues and world religions. Her latest history titles include Living Through the Vietnam War (Raintree, 2011), Our World Divided: Israel and the Middle East (Wayland, 2011) and A Cultural History of Women in America: Women Claim the Vote (Bailey Publishing, 2011).

She has a particular interest in the topics of migration, refugees and racism and recently wrote Mapping Global Issues: Immigrants and Refugees (Arcturus, 2011). In her work, Cath aims to highlight individuals' experiences and to present different viewpoints in a non-judgemental way as a basis for discussion.

Cath also works as a project manager and editor on non-fiction titles for both children and adults. Before embarking on a freelance career, she worked as a commissioning editor for a children's educational publishing company for eight years. She is also an experienced ESOL teacher.

Cath volunteers with City Reads, a project that aims to widen the enjoyment of books and reading among people of all ages, especially people from disadvantaged communities. She is a also a keen amateur cyclist, cook and gardener.

Giles Sparrow studied astronomy at University College, London, and science communication at Imperial College, before embarking on a career in publishing.

Starting out as an editor, he worked on various science reference books for young readers, including DK's Eyewitness series and their larger Visual Encyclopedia series.

He is now a popular science author with a string of beautiful and successful books for adults and children under his belt, including Universe: The Definitive Visual Guide, Cosmos, Spaceflight, Exploring the Solar System series, and many others.