PREVIOUS BOOK IN SERIES: FIRST FROST, ISBN 9780593830673. In 'Return to Sender', the Sheriff of Absaroka confronts a cabal of devious outlaws who are hell bent on getting what they want, even though they have to bend and break the law. Walt is stretched to his physical limits to try to stop them, and has to answer the question of just how far he will go to stop these outlaws.