Books on the Prussian Napoleonic Armies by Stephen Summerfield. The following are now in print:

- Prussian Landwehr of the Napoleonic Wars (A4 handback)
https://www.academia.edu/36093735/PRUSSIAN_LANDWEHR_OF_THE_NAPOLEONIC_WARS

- Prussian Guard of the Napoleonic Wars (Military Colours Series Paperback)
https://www.academia.edu/36094266/PRUSSIAN_GUARD_OF_THE_NAPOLEONIC_WARS_MILITARY_COLOURS_MC-003_

- Becke's Waterloo Logistics (Hardback)
https://www.academia.edu/36063281/Beckes_Waterloo_Logistics

These are completely new books and re-illustrated. The First two books have over 300 new schema from Stanislav Lyulin.

You can purchase them from Ken Trotman Books.