#Book Review – Sister Agatha: The World’s Oldest Serial Killer; D. O’Donoghue

Book review stop! Today I’m delighted to be the host for Sister Agatha: The World’s Oldest Serial Killer, a humorous comedy written by D. O’Donoghue

First thing first, let me thank Rachel and the author for providing me with an e-copy of this book. Much obliged *hat tip* 


Sister Agatha is 118 years of age, whose vim and vigour would put the most robust athletes to shame. However, during a routine check-up, her doctor claims that she has just a week to live – inconvenient, seeing as the beloved sister once made an improbable vow: to be the oldest person in the world. At last count, she was the fifth.

Never one to admit defeat, Sister Agatha concocts a bold Plan B. Using her final days, she intends on travelling the world to meet the only four people whose birthday cakes boast more candles than hers.

And then, one by one, she will kill them.

194 pages
Humorous Comedy
Publication date: 31/03/22
Purchase links



Cover: I prefer the painting one, it captures the spirit of the book in a perfect way.

So, I don’t really agree with the ‘hilarious’ take everyone seems to label SIster Agatha with. It’s not because you have an unfunny book in your hands–far from it! Sister Agatha is an entertaining novel, and humorous parts are def present; it’s just not a guffwaf-inducing story, since the merry tone is a bit more subdued that I thought before starting it.

If you ask me, it’s a feature rather than a bug.

However, the thing that makes Sister Agatha noteworthy is O’Donoghue’s attitude towards spoilers. A huge one is right there, just a few pages in: you’re following Agatha, a dynamic elderly nun whose life seems to be hunky-dory, until the hunky-doriness starts cracking, and hey! Spoiler!

Thank. You. Thank you for straying from the beaten, boring path and offering me a different perspective.

I mean, I respect the majority when it comes to spoilers, I do. I just don’t understand it. Being spoiled is maybe the best thrill I get out of books, being able to know what’s going to happen rather than panicking together with the characters–wow. Best feeling ever and one of the main reasons I read.


The story itself is entertaining, all the characters have a great inner voice–yay! O’Donoghue’s writing skills are excellent, and Sister Agatha showcases them in a beautiful way.

I couldn’t be more pleased, highly recommended.

5 stars on GR.


Hailing from Navan, Co. Meath, Domhnall is a graduate of the Bachelor in Acting Studies Programme, Trinity College Dublin, later completing a Master’s in Screenwriting at Dún Laoghaire IADT. He now works as a journalist, author and actor.

Are you interested in getting your book reviewed in a week? 

Contact me!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s