This is definitely a Christian book. The premise of the book is that people who have died come back as "angel assistants" to man a cafe where they minister to people who enter. The author makes the distinction between these "angel assistants" and angels, stating that angels are created beings while "angel assistants" are people who have died. Throughout the book, there are chapters that "occur" in heaven when the "angel assistants" go back once a week and interact with others there.
The story line revolves around Amanda (a dedicated Christian who has lost father and home) and Kris (an unwed pregnant young woman) and the interaction between them and the other characters. When Kris's baby is abducted, Amanda is the one who keeps Kris going through her prayers and friendship.
This is definitely a Christian book. Why did I repeat that? One of the "angel assistants" was killed only a few weeks after becoming a Christian. Bertie is referred to as a "naughty angel" because she cannot refrain from using profanity, even when she goes back to heaven once a week.
Other characters are Max (the head "angel assistant"), Doug ( a new "angel assistant"), Dean (a police officer), Amos and Andrew (twin brothers who are customers at the cafe), Martin (Max's friend and liaison in Heaven); and the kidnappers.