Wikipedia: Secret of the Scarlet Hand - Article on the game including spoilers and trivia. - http://en.wikipedia.org/wiki/Secret_of_the_Scarlet_Hand
JustAdventure: Secret of the Scarlet Hand - Walkthrough with spoilers and screenshots of puzzle solutions. - http://www.justadventure.com/Walkthroughs/NancyDrewSSH/NancyDrewSSH.shtm
Quandary Reviews - Review by Emily Sheehan. "I thought Secret of the Scarlet Hand was harder than the other Nancy Drew games I have played, a bit more grown-up." Provides system requirements and screenshots. - http://www.quandaryland.com/jsp/dispArticle.jsp?index=474