AdamCadre.ac: Games: Author's website. Download free in Z-machine or PC executable format, or play it online with Java.
Baf's Guide to the IF Archive: Varicella: Rated 5/5 by Duncan Stevens. "Twisted, bleak, and filled with dark humor, Varicella is perhaps the most disturbing work of IF ever written--but it's also one of the best." Links to game and walkthrough.
SPAG Review: "This is one of the best-written works of IF ever, bar none." Analytical review by Duncan Stevens.