Kostyuchenko spoke to ABC News' Linsey Davis about the premise of the book. She also opened up about falling ill last October after what she claims was a poisoning attempt by the Russian state.

Man Behind the I Spy Series, Photographer Walter Wick, Reveals the Secrets to His Whimsical Scenes (Exclusive). More than 30 years after the first of the beloved children's book series was ...

If ABC's new series has you curious about the comic book history of Marvel's spy agency, here's a quick primer. Level 7 clearance, of course.

I Spy 123: Totally Crazy Numbers Ulrike Sauerhöfer, illus. by Manuela Ancutici. Firefly, $14.95 (32p) ISBN 978-1-77085-999-9 ...