Monumenta historiam Uscocchorum illustrantia Mondo (ed. Karlo Horvat)
Book Monumenta historiam Uscocchorum illustrantiaMondo, (eng. Monuments illuminating the history of the Uskoks, taken from the Roman archives especially the Vatican Secret Archive) was published by Karlo Horvat in Zagrebu (1910/1913). The book contains many sources about warfare and Uskok customs from the Vatican archives.
Book
Attached are both volumes of the mentioned book about the Uskoks from Senj. In case the preview does not work, you can view the book directly on Archive.org (Svezak I, Svezak II)