[1] She gained global attention for her three works – Mirror (2003), Wave (2008), and Shadow (2010), known collectively as "The Border Trilogy" – using the center binding of the pages of a book as a means to create a narrative crossing the boundaries between reality and fantasy.

[10] Suzy Lee made her debut as a picture-book artist with Alice in Wonderland, which was the final project for her master's program.

Beginning with her solo exhibition highlighting "The Border Trilogy" at the Museo d’Arte Moderna di Bologna (MAMBo) in Italy,[12][13] Suzy Lee has been engaging with readers and audiences across the world through exhibitions and book fairs held in countries including the United States, Swenden, Germany, Brazil, Spain, China, Singapore, Japan, India, Mexico, Italy, France and Korea.

[5]In 2019, she received the 60th Korean Publishing Culture Award[16] and selected for the IBBY Honour List for River,[17] a book inspired by a personal story of her dog.

For Suzy Lee, the charm of picture-books lies in their power as a medium to convey the simplest truths in a simple yet refined manner.

She uses a wide variety of materials from pen, pencil, charcoal, watercolor to acrylic, and different artistic practices including collage and print-making, depending on the book she is working on.