His first title, The Felix Activity Book, based on characters created in Germany by author Annette Langen and illustrator Constanza Droop,[18] was published in 1996.

[19] Nobleman’s other writing credits include humor articles for Nickelodeon Magazine,[20][21][22] an episode of the TV show Daniel Tiger’s Neighborhood,[23] and a reference book for adults (What's the Difference?

He has spoken worldwide[24] at schools, conferences, and other venues including the U.S. State Department,[25] the Queen Mary 2 cruise ship,[26] and the 92nd Street Y.

[29] Nobleman created, wrote, directed, and produced Songbook, a part-scripted, part-reality children's web series, in partnership with the Kennedy Center for the Performing Arts, Kwame Alexander, and Mary Rand Hess.

[30] He is also a cartoonist whose single-panel gag cartoons have appeared in publications including The Wall Street Journal, Harvard Business Review, Forbes, Good Housekeeping,[31] Punch, and the Chicken Soup for the Soul book series.

[32] In 2006,[33] Nobleman began researching for a nonfiction picture book about Bill Finger’s role in the creation of Batman, who debuted in 1939.

[49] After the manuscript received 34 rejections,[17] Charlesbridge published Bill the Boy Wonder: The Secret Co-Creator of Batman (illustrated by Ty Templeton) in 2012.

It reads “Batman created by Bob Kane with Bill Finger.”[55] Prior to this, DC had added creator names to characters who were originally uncredited.