Closing or locking down a book in fixed assets

 We currently have two active books (plus the tax books) in Fixed Assets.  We are in the process of migrating the data from one of the books and corresponding tax book to another system.  We want to keep the data in those books in Oracle for querying historical data, but we want it locked down so that no updates can be done on the data and so that when we run depreciation or advance the calendar for the other active book that we don't do it for this book that we are migrating off.  Is there a way to do