Well done, that man!
We donāt have a problem with that opinion.
I didnāt like chastising you for promoting a book which has personal significance for you and which might interest some forum members, but weāve had problems with authors descending from the clouds to inform us in their first few posts about their magnum opus with a view to sales and never posting a bloody thing of any value to the forum.
Perhaps you might like to inform us in the appropriate section of the forum about some of your grandfatherās exeperiences, where it would be appropriate to cite your book purely as a reference with no commercial overtones.