The tiny wife

This is a small book  written by Canadian writer, Andrew Kaufman. It all starts with a bank robbery where instead of money the robber takes an item of sentimental value from those in the bank at the time. Shortly afterwards the people who had been robbed have life changing experiences resulting in death for some. Stacey Hinterland discovers that after the robbery she begins to shrink until it is feared that she will disappear entirely. What do Stacey and her family need to do to reverse this process? A modern day fable.