I've been meaning to write about one of my favorite series of adulthood, The O'Malley series by Dee Henderson. I love this series and have read it through several times over the last few years.
The characters are a lot of fun - they have depth and warmth and faults, etc. It's Christian fiction with a Christian message(and a little romance and a little mystery) without being too preachy or too goody-goody, which I find in a lot of Christian fiction.
Each book deals with a different member of the O'Malley family - a group of orphans who met in a foster-type house in Chicago and legally changed their names once they reached adulthood to become their own family. And each book deals with a doubt or question about the Lord or hurdle to coming to the Lord based on their own history.
In the first book, Kate, deals with the aspect of God as a loving father vs. her own history of her father not being loving at all (she was removed from her home at the age of 9 because of his abuse).
The second book, Marcus's story, deals with the belief in prayer from the perspective of a man who, as a child, prayed for his mother to be healed and lost her anyway.
In the third book, Lisa who is now a forensic scientist who deals with investigating deaths for the police, deals with the resurrection.
There are 6 books and a prequel in this series. Each member of the family is a public servant of sorts (a cop/hostage negotiator, a US Marshall, a firefighter, a paramedic, a crisis counselor for the Red Cross, a pediatrician) in each story the main character finds the Lord, peace with their own history and love.
If you are looking for a series to dig into, this is a really good choice.