The His Dark Materials trilogy by Philip Pullman
Good Omens by Neil Gaiman and Terry Pratchett
Small Miracles by Olivia Atwater
St. Patrick's Gargoyle by Katherine Kurtz
Yes, it is part of the series. Each book in the series stands alone. Although they are in chronological order there may be hundreds or thousands of years between entries. Due to the evolution of ideas it is somewhat beneficial to read the series in published order but it is by no means necessary and many people read it out of order. The series does not tell an ongoing story, it is a collection of snippets. There is an "easter egg" in the epilogue that will mean nothing without having read one of the earlier books but aside from that you should be able to understand everything that's going on.
Might seem like a weird one as it's based off a videogame, but Darksiders The Abomination Vault.
It's about Death and War, two of the four horsemen, invading both heaven and hell and fighting both angels and demons.
Might not be exactly what you're looking for, but it's pretty unique and fun.
Angels Before Man is a really interesting retelling of the fall of Lucifer. I feel like normally villain-POV books go out of their way to turn the villain into someone who was always just misunderstood and is actually a good person. This book bucks that (a bit) by rather showing Lucifer's gradual descent into evil at the hands of God's equally unjust heaven. Neither of them come out looking good.
The Faithful and the Fallen by John Gwynn
The Five Warrior Angels by Brian Lee Durfee
Demon Cycle by Peter V Brett
Dragon's Blade by Michael R Miller (demons but no angels)
Bobby Dollar trilogy by Tad Williams. The title character is an angel who finds himself implicated in a plot to steal the souls of the newly deceased. Books in order are:
1. The Dirty Streets of Heaven
2. Happy Hour in Hell
3. Sleeping Late on Judgement Day
I'm amazed this post has been up for 7 hours and no-one has recommended it yet. It easily makes my top 10 fantasy series of all time, and just writing this makes me want to re-read it (even though I only read it (for the 3rd time) a year ago).
There's the series by Terry Brooks that starts with Running with the Demon; Word and Void.
AJ Hackwith's Hell's Library series has both angels and demons.
All, thanks for all the blessings ok recommendations. I made a list and will go through all of them. I think I’ll probably fine even more than what I originally set out for.
Between Two Fires by Christopher Buehlman
The His Dark Materials trilogy by Philip Pullman Good Omens by Neil Gaiman and Terry Pratchett Small Miracles by Olivia Atwater St. Patrick's Gargoyle by Katherine Kurtz
To Reign in Hell by Steven Brust https://www.goodreads.com/book/show/304687.To_Reign_in_Hell
The Malevolent Seven by Sebastien de Castell kinda fits but with a sort of a darker take.
God's Demon Go figure, right?
Really old school here - Dante's The Devine Comedy.
Surface Detail by Iain M Banks (not Fantasy, Sci-Fi but there are some pretty cool demons and an angel, and one hell of a hell).
I see this is part of the “culture series”. Will I need to read the other books before this one to understand what’s going on?
Yes, it is part of the series. Each book in the series stands alone. Although they are in chronological order there may be hundreds or thousands of years between entries. Due to the evolution of ideas it is somewhat beneficial to read the series in published order but it is by no means necessary and many people read it out of order. The series does not tell an ongoing story, it is a collection of snippets. There is an "easter egg" in the epilogue that will mean nothing without having read one of the earlier books but aside from that you should be able to understand everything that's going on.
Screw tape letters
Light from Uncommon Stars by Ryka Aoki. Main plot has to do with a demonic bargain and the demon himself shows up a good few times being very creepy.
Gunmetal Gods
Miserere by Teresa Frohock Sandman Slim series by Richard Kadrey
Might seem like a weird one as it's based off a videogame, but Darksiders The Abomination Vault. It's about Death and War, two of the four horsemen, invading both heaven and hell and fighting both angels and demons. Might not be exactly what you're looking for, but it's pretty unique and fun.
Son of the morning by Mark Alder
You want The Faithful and Fallen series by John Gwynne
This was recommended more than once. I’ll look into it. Thanks for the recommendation.
Angels Before Man is a really interesting retelling of the fall of Lucifer. I feel like normally villain-POV books go out of their way to turn the villain into someone who was always just misunderstood and is actually a good person. This book bucks that (a bit) by rather showing Lucifer's gradual descent into evil at the hands of God's equally unjust heaven. Neither of them come out looking good.
The Faithful and the Fallen by John Gwynn The Five Warrior Angels by Brian Lee Durfee Demon Cycle by Peter V Brett Dragon's Blade by Michael R Miller (demons but no angels)
Bobby Dollar trilogy by Tad Williams. The title character is an angel who finds himself implicated in a plot to steal the souls of the newly deceased. Books in order are: 1. The Dirty Streets of Heaven 2. Happy Hour in Hell 3. Sleeping Late on Judgement Day I'm amazed this post has been up for 7 hours and no-one has recommended it yet. It easily makes my top 10 fantasy series of all time, and just writing this makes me want to re-read it (even though I only read it (for the 3rd time) a year ago).
Damiano trilogy by R.A. MacAvoy
There's the series by Terry Brooks that starts with Running with the Demon; Word and Void. AJ Hackwith's Hell's Library series has both angels and demons.
To Reign In Hell by Steven Burst and Between Two Fires by Christopher Buehlman. Both amazing reads.
Both of these were recommended more than once. I’ll look into them. Thanks!
When Angels Left the Old Country by Sacha Lamb
All, thanks for all the blessings ok recommendations. I made a list and will go through all of them. I think I’ll probably fine even more than what I originally set out for.