Dan Waddell started his writing career selling stories to the tabloids before becoming a sports writer for BBC books. He is the author of How To Be a Detective (9781406334265) and Who Do You Think You Are? Be a Family Tree Detective (9781406327885). He has also recently published two crime novels, The Blood Atonement and The Blood Detective. Dan lives in London, W4. Visit his website at http://www.danwaddell.net

Nikalas Catlow has been doodling and drawing since childhood and holds an MA in children's book illustration. He is the co-creator of popular children's series Mega Mash-ups, Seriously Silly Activities and Awesomely Brilliant Doodles. Nikalas lives in London, SE15.