From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! Dear Karen Brewer: Karen has started collecting stamps. She wants some special new ones, but the mail just brings the same old kind. Then Karen gets a chain letter. It promises good luck and piles of postcards — if Karen answers quickly. Piles of postcards means piles of stamps, right? And good luck — what could be wrong with that? Karen wants to link up with this chain letter right away!