I couldn't say if there are angels or not around. But Diana Cooper makes you feel there are, and they are all around, and they are just waiting for you to ask them to do something for you and for the others... After reading this book, you just can't help asking an angel to help you to find the keys, or to help you to be on time to your appointment, or to go to comfort people... And it just works like magic!
You don't find too many stories about people telling their angelic miracles in this book (but there are some!). In the first half of the book, Diana Cooper explains what the angels can do for you and how to ask them for assistance in any task (little or big). She explains how to recognise an angelic presence, and how the angels heal, protect and help, everything very practic and friendly.
In the second half of the book, you find an explanation about the best known angels and archangels and the angelic hierarchy, with their own "specialities". Is little bit more intellectual, but still very clear and "reader friendly".
What I felt reading this book is that for Diana Cooper the angels are as real as the firefighters, for example: you don't see them everyday (generally), but if you need them, you don't waste time wondering if they are going to help you, if the fire is important enough, or if you are worthy: you just pick up the phone and ask for help, and they come and help you. The whole book have the same kind of approach: it will convince you that the angels are with you, their job is to help you, and the more they help you the more happy they are and the better is your life.
And it works so well (I don't ask myself if it works because the books hipnotise you, or because there are indeed angels!), you can't help but being amazed and getting used to call angels!
You will just believe!