Which Hannah Fry book is for me?
Five questions to find your perfect starting point. Takes about 30 seconds.
Prefer to choose by topic? Use the decision tree
- Interested in algorithms and AI? → Hello World
- Interested in decision-making and uncertainty? → No One Knows What They're Doing
- Interested in relationships and dating? → The Mathematics of Love
- Want something fun and festive? → The Indisputable Existence of Santa Claus
- Enjoy Curious Cases or the podcast? → Complete Guide to Absolutely Everything
- Not sure? → Start here
Common questions
How does the quiz work?
Five questions, each with 3-4 options. Your answers are scored against each of the five Hannah Fry books, and we recommend the best match.
Is this accurate?
It is a fun starting point, not a scientific test. If you are unsure, Hello World is the safest first choice.
What if I have already read the recommended book?
Try the next-best match, or see our full book guide for all five.
About each book
Hello World (2018)
Hannah Fry's most widely read book. It explores how algorithms shape everyday life — from criminal sentencing and dating apps to medical diagnosis and self-driving cars. Written for a general audience, it requires no maths background. If you want one book that explains why AI decisions matter, this is it.
No One Knows What They're Doing (2027)
Her newest book, published just before the Come Fry With Me tour. It tackles decision-making under uncertainty: why experts disagree, why plans fail, and how to make better choices when you do not have all the information. If you are drawn to the messy reality of risk and doubt, start here.
The Mathematics of Love (2015)
A short, playful book based on her TED talk. It applies probability and game theory to dating, relationships and marriage. At around 120 pages, it is the quickest read in her catalogue and a good gift for someone who likes maths but has not read much popular science.
The Indisputable Existence of Santa Claus (2016)
Co-written with Thomas Oléron Evans, this is a festive collection of mathematical puzzles: how to wrap presents efficiently, the game theory of Christmas dinner, and whether Santa could deliver all those gifts. It is the lightest and most fun of the five, and works well as a group read or a gift.
Rutherford and Fry's Complete Guide to Absolutely Everything (2021)
Co-written with Adam Rutherford, this is the book version of their BBC Radio 4 podcast. It covers big scientific questions in a chatty, accessible style: why do we sleep, what is consciousness, are we alone in the universe? If you enjoy science podcasts or The Rest Is Science, this is your starting point.
How the quiz scoring works
Each answer adds points to one or more of the five books. Your result is the book with the highest total. Ties go to the book that appeared first in the scoring. The quiz is a fun starting point, not a definitive recommendation — if you have already read the suggested book, move to the one with the next-highest score, or browse the where-to-start guide.