Murder Can Ruin Your Looks(1995)
(The second book in the Desiree Shapiro series)
A novel by Selma Eichler
When identical twins are shot, one dies and one is left in a coma. Desiree Shapiro, New York's funniest--and most overweight--PI, is sent to figure out which is which, but instead finds herself searching for a cold-blooded killer.
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Used availability for Selma Eichler's Murder Can Ruin Your Looks
December 2003 : USA Hardback
April 1995 : USA Mass Market Paperback