AlixZ,
The book catalogue "The Art of Grand Duchess Olga" is not from the Smithsonian Exhibit. It is from a Russian exhibit to benefit the Russian Relief Program in the Name of Grand Duchess Olga Alexandrovna. The catalogue is written in three languages: Russian, English, and French. It is approx 119 pages with approx 50 paintings by Olga. The graphics of the paintings are very nice and most of them are large. I like the book because it is the only volume I've been able to find with a collection of Olga's work. It is a bit expensive for paperback, but if you are looking for a nice collection of her paintings, then I think it is a nice addition to your library.
The first section of the book has an essay about Olga and her art.
I hope this helps.