A verry good book is:"A longlife Passion" a poignant portret of N&A, from Andrei Maylunas & Sergei Mironenko. I loved it, because you can read parts of their private letters and diaries. You learn much about their initimate relationship. I also like "The Last Tsar"by Edvard Radzinsky. " Tsar, a Lost World"by Peter Kurth and "Nicholas and Alexandra (the last imperial family of tsarist Russia by the stage Hermitage museum.
I've got so many books about the romanovs. I fell in love with them after seeing the picture Nicholas and Alexandra. I was only 11 years old. Some people find this picture, not verry realistic, but the part of Alexandra
played by Janet Suzman was outstanding.
It was the beginning of a life correspondence, between the great actress and me. But i'm still searching for books, especially about Alexandra. I recently found a book, in a little antique store by Serge von Markov written in 1928 "How we tried to save the Tsarina."
At the moment i'm reading "the Fate of the Romanovs"by Greg King. So there are lots of books about about the family, sometimes hard to find.