Here are some links that are relevant to this type of sculpture, and may pique your interest.
Technology Transfer Program First, the link to my sculpture page through Northwestern University. It was made by the Technology Transfer Program, whereas this is my personal page on the sculptures and is not supported by anyone official but myself.
Masters of Deception: Escher, Dali, and the Artists of Optical Illusion Next, a book on art that has multiple ways of looking at it, or in some way plays tricks on the eyes. Some of the artists in this book make sculptures that are similar to mine, but use very different methods to achieve the views. I highly recommend reading it, if only flipping through the copy at the bookstore.
Markus Raetz has done similar work to mine, as well as a wide range of other work. He has the most similarities to my work of any other artist I've seen; he even uses different words on each viewpoint.
Shigeo Fukada This artist, one of those featured in the above book, does many interesting sculptures that I enjoy. A few, especially his "Transformations," have the same effect as mine, but they are structurally simpler and visually more complex. I would love to make a sculpture like Fukada's "Encore," except fragmented and suspended like my previous sculptures.
Guido Moretti Also featured in Masters of Deception, Moretti does very interesting sculptures that look different from different views, although his are much more geometric. I love the way his shapes seem almost grown, rather than built, as if they are complex crystals.
Edward J. Tufte A very interesting artist who is similar to the sculptures not so much in form, but in function. His sculptures use lots of angles and lines of sight, while other works by him are very mathematical and scientific in nature. He literally turns graphs into an art form. Also, he hates boring PowerPoint.