#paperback#1980s#ketchupsisters#juvenilemystery#htf#oop Ten-year-olds Monica and Dee Ellen team up as detectives and before long are pledging their friendship in ketchup (rather than blood). When a famous necklace is stolen from the local museum, they have their first case--an investigation of hilarious proportions. 1989 Amazing condition May have minor shelf wear Tight binding No page marks Please look at photos carefully and ask questions before purchase, happy to help Shop with confidence Ships fast Nonsmoking home