Inquiry into the Existence of Guardian Angels
Link to the website of this incredible book written by the French reporter Pierre Jovanovic on the evidence supporting the existence of angels. This work summarizing six years of authoritative research is so convincing it all but started this website author's quest which has now brought "Catholic Pilgrims" into reality. A refreshing departure from the multitude of new age angel titles, this book also describes at length the experiences of many Catholic saints and visionaries, along with their connection with angels.
Catholic Online Angels
A large Catholic resource on the history and existence of angels.