Diane Duane is known for four sets of work:
- The "Young Wizards" series of YA fantasy. Eight books so far, with a ninth due next near after a short hiatus. The first book is So You Want to Be a Wizard. These are about as famous as YA fantasy can get, certainly better-known (and probably better-loved) than Pratchett's Johnny Maxwell books. I have read them all, and found several of them to be excellent, most of them to be good, and only one or two to be merely competent. They deal with serious themes seriously, and treat the consequences of decisions with the gravity they are due.
- The "Feline wizards" spinoffs from the above series. I'm allergic to cats-as-characters, so I have no interest in these and haven't read them. Perhaps others can comment.
- The Tale of the Five, an unfinished adult tetralogy that has seen books published in 1979, 1984, 1992, and "any year now". Frustrating for fans, but Ms. Duane is allegedly working on the final book, so we can hope it will someday escape the Invisible Library (where I suppose it is shelved near The Universal Pantograph) and reach our universe. The books in the series are The Door Into Fire, The Door Into Shadow, The Door Into Sunset, and (someday) The Door Into Starlight.
- Quite a few franchise novels -- Star Trek , Spiderman, X-Men, Tom Clancy's NetForce (!?), etc. -- of which I know nothing. Authors, too, must eat.