I am just finishing my next book which will be on the Napoleonic Services of John Burgoyne RE. Most of it covers the Peninsular War 1808-14, Burgoyne being present for most of this time. As well as looking at the engineering aspects it does take the opportunity to look at some other contentious issues from the War.
It is due to be published in the first half of 2020 by Helion.
It is due to be published in the first half of 2020 by Helion.