Assets Migration

Hi All

I have a specific requirement for Aset Migration. We are having 500 Assets in One Asset book and we need to move these Asset into another existing Asset Book.

The Assets are 5-6 years old.
I will add the asset with its accumulated depreciation & YTD depreciation in the new Asset Book through web Adi .
Reverse the Additions Journal in GL.
If I add asset with Acc Dep & YTD Dep there will be accounting for Depreciation  take place. Should I reverse that entry
also?
What should I do with the assets in the old book?
I will definately retire it in the old book.