Leong is the Art Director for the 'Aya.Takeo' webcomic; commissioned by Prentice Associates and now published by Sweatdrop Studios across three volumes. She has authored many instructional art books, such as 'Beginning Manga' (Walter Foster), 'Manga Your World' (Search Press), 'Draw Manga: Complete Skills' (Search Press) and '101 Top Tips from Professional Manga Artists' (Barrons). She was the Head Contributor to 'Draw Manga' by Sweatdrop Studios from New Holland Publishers (UK) Ltd. Her work also appears in '500 Manga Characters' by Sweatdrop Studios from Ilex; 'Drawing Manga' by Selina Dean; 'Manga Clip Art' by Hayden Scott-Baron,'50 Manga Babes to Draw and Paint' by Chi Hang Li. and 'Super Cute Chibis to Draw and Paint' by Joanna Zhou. She illustrated the graphic novel 'Great Lives: Marie Curie' for B.E.S. Publishing and the 'Manga Life' series of self-help books for Infinite Ideas. and headed the conceptual art and design of the collectible card game 'Herocard Cyberspace' from Tablestar Games. Her work appeared in "Popcorn", a British movie directed by Darren Paul Fisher, starring Jack Ryder (EastEnders) and Jodie Albert (Hollyoaks). Her illustrations were also used on the set of Channel 4's award-winning British sitcom "The IT Crowd" in series 3, as well the dark comedy "Flowers (TV series)". She was also filmed for CNN International's 2015 coverage of Formula One historic battles at the Suzuka Circuit, illustrating the rivalry between Ayrton Senna and Alain Prost. Leong's work in children's publishing includes illustrating the choose-your-own-adventure style 'I, Hero' series by Steve Skidmore and Steve Barrow (The Two Steves) for Hachette; the 'Girls FC' series by Helena Pielichaty for Walker Books; and 'Ninja: First Mission' by Chris Bradford of Young Samurai fame. Leong collaborated on Wacom's Manga campaign which appeared in major German magazines using her art to promote the wildly successful 'Pimp My Character' contest featured in the German publication Animania; her work also featured on the Wacom website in an article promoting the use of Wacom in the creation of manga.