01 / Start with a problem
Choose the topics and content language that interest you. Available daily editions bring two selected book perspectives to one original problem.
One problem. Two books. Three reading depths. You decide.
BookDuel: One Real Problem. Two Nonfiction Books. Three Reading Depths.
A new perspective starts with a better question. Explore how two nonfiction books approach the same real-world problem, compare their ideas and limits, and decide what you would try.
Web app access · Passwordless email sign-in · Available editions depend on your preferences
A public comparison to start with
How do you build a habit when motivation is zero?
Contender A
Atomic Habits
James Clear
Identity + systems
Contender B
Tiny Habits
BJ Fogg
Small actions + positive emotion
Compare how the books trigger a new habit, make it feel rewarding, and approach unwanted behaviors. The public side-by-side summary is available without signing in.
Read the public summary →A fixed routine may not fit a changing schedule; a tiny starting action may need a separate plan for growing. Explore those limits and try two practical experiments.
Read the public critique →Preview excerpts from the public comparison. App reading depths: short Teaser, 5–7-minute Summary, 10–12-minute Deep Dive. No live poll results are shown here.
A daily invitation. Never a race.
02 / Choose your depth
Start with a short Teaser, take 5–7 minutes for the Summary, or explore the context and limits in a 10–12-minute Deep Dive.
03 / Decide what you would try
Save an assigned edition, work through practical actions, and choose an approach—or neither. Community results follow the poll’s release conditions.
Looking for an a book a day habit? Explore a daily reading ritual built around two perspectives.
Before you begin
Is BookDuel the same service as abookaday.co?
Yes. A Book a Day is now BookDuel, operated by CC Technologies GmbH. The new name reflects the two-book comparison at the heart of the reading experience.
Are these the full books?
No. BookDuel offers independent explanations and applications of selected book concepts. Read the original books for the authors’ complete arguments and context.
Does the community vote prove which book is right?
No. A vote records a reader’s preference in a scenario, not a scientific finding or an endorsement. Results are shown only when the app’s release conditions and minimum response threshold are met.
Can I read before signing in?
Yes. Public comparisons include the teaser, summary, comparison table and critique. Sign-in is needed for saved practical actions, the comparison’s evidence notes and community voting, and the app’s personalized assignments.