This is an exciting event, I think, because this book describes for the first time songs that one witness at the time said were so thrilling to hear that if you were not there you could not possibly imagine it.
The songs are the political songs that were sung in Spain against King Joseph Bonaparte during the war known in the UK as the Peninsular War or in Spain as the Guerra de la Independencia. Most of their surviving musical scores are now outside Spain, in London, Lisbon, and elsewhere, which is no doubt why these songs and their music have not previously been described. The book has a catalogue of about 160 of these songs and gives for the first time the full context of their existence.
I see the songs as one of the most powerful aspects of the propaganda of the time because in these songs, the recipients of the propaganda not merely heard the message but participated in it by actually themselves singing the message of the propaganda.
The principal composer of songs of the war was Fernando Sor, who has six known songs of this kind to his credit, all of them discussed in this book. The book gives full and often previously unexplored details about the circumstances in which he and others wrote and composed these songs.
I think that you will find the book interesting and with new information if you are interested in the Peninsular War, or the Guerra de la Independencia, or Fernando Sor, or the nature of propaganda, or indeed the whole political and propagandistic state of Spain at that time. The book has been awaited for quite a while.
If you are purchasing either the paperbound or the clothbound versions of the book, you may find it useful to get also the ebook which can serve as an electronic index, for just a token amount more, especially if you are professionally involved in this field. For example, if you are looking for a particular song, sometimes it is known by its title, sometimes by its first line, or sometimes by the first line of the chorus. The ebook as index will find any of them.