From Opus Sanctorum Angelorum:
Before I entered religious life, I managed a convenience store not far from my sister’s house. Occasionally, I would spend the night there and help her as she has 7 children. I always slept downstairs on the couch but this particular night I felt that I should sleep upstairs in the girl’s bedroom. My nephew, Anthony, who was 2 at the time, wanted to sleep in the bunk bed with his 6-year-old sister.
During the night, all of a sudden I was awakened out of a deep sleep by my Holy Guardian Angel. He said “Look!” and there was my little nephew hanging from the safety slats of the bed, completely blue and choking to death. Somehow he had slipped in between the slats.
I was so afraid to lift him up, because I didn’t know if could slide back or if he was already dead. But I was able to lift him out and save his life. I continued to pray through the night. After quite some time I could see he was okay and then I could rest. Soon after I was able to talk with Fr. McGowan, who said to bring him for the consecration to the Guardian Angel as soon as possible. And today because of the Holy Guardian Angels, Anthony is now a faithful priest in the Lansing Diocese and I am a Sister of the Holy Cross.
— Sister Maria Gemma
[Resources: books on angels]