I recently picked up a copy of this book, "Tsarskoe Selo, the Residence of Russian Monarchs" by S. Lastochkin and Y. Rubezhansky, which was published this year.
The book is mainly about all the historical buildings and monuments in Pushkin/Tsarskoe Selo, and the history behind them. I believe that it is the only book of its kind dedicated strictly to the history of the town of Tsarskoe Selo, but unfortunately it is in Russian and as far as I know it has not been translated into any other language yet...
