In the vein of the movie ‘The Lake House’ in which a mailbox links two different times, this book has just such a communication device which links past with present, and two different geographical locations: present-day San Francisco with 1890s Kansas. I have always been fascinated by stories that bend time and space, and this one weaves properly fleshed-out characters in a well-developed plot. I particularly enjoyed the wit and banter between the two main protagonists. Part of the story is told in letters, and I love the quality of the personal correspondence: well-written, clearly elucidated, and exchange of ‘courteous barbs’, if you will -- made me laugh aloud in some places. There are twists in the story which I did not see coming, and while you could have knocked me over with a feather at the revelation, I was greatly delighted at the brilliant storytelling. This quantum story gets a 5-star rating from me.