Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
whose book is this
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "whose book is this" is correct and usable in written English. You can use it when you want to inquire about the ownership of a book. Example: "I found a book on the table; whose book is this?" Alternative expressions include "who owns this book" and "to whom does this book belong."
✓ Grammatically correct
News & Media
Wiki
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
1 human-written examples
Malcolm X said, gruffly, 'Whose book is this?' I told him 'yours, of course,' and that I only made the objection in my position as a writer.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
I'd say it was a homage, but can you really use that word for a musical whose "book" is the pilot of a '90s prime-time soap?
News & Media
Van Johnson is Ted Lawson, the real-life flier whose book was the basis for the film, and Spencer Tracy is Doolittle.
News & Media
Dr. Thuan, whose book is being reissued in the United States this winter, failed to respond to requests for an interview.
News & Media
A host of other Socialists will follow this autumn, including Jack Lang, whose book is called "Everything You Always Wanted to Know About Me".
News & Media
So, whose book is right?
News & Media
But whose book is it?
News & Media
Ms. Brody, whose book is titled "Help!
News & Media
Dr Aldrin, whose book is reviewed here, would prefer NASA to aim for Mars directly.
News & Media
"They got 80,000 responses the first week," said Ms. Heilman, whose book is great for kids.
News & Media
For Dr. Fleming, whose book is a scholarly look at the history of weather modification and similar efforts, geoengineering proposals are "untested, untestable and dangerous beyond belief".
News & Media
Expert writing Tips
Best practice
When asking "whose book is this", ensure you are in a context where determining ownership is relevant, such as finding a lost item or clarifying who should be responsible for it.
Common error
Avoid confusing "whose", which indicates possession, with "who's", which is a contraction of "who is". Using "who's book is this?" is grammatically incorrect in this context.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "whose book is this" functions as an interrogative phrase used to inquire about the ownership of a book. As Ludwig AI indicates, it is a grammatically sound question. The examples show it's used in direct inquiries.
Frequent in
News & Media
50%
Wiki
50%
Encyclopedias
0%
Less common in
Formal & Business
0%
Science
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "whose book is this" is a grammatically correct interrogative phrase used to inquire about the ownership of a book. As Ludwig AI states, the phrase is both correct and usable. Although categorized as "Uncommon" in frequency, it is used in various contexts, particularly in News & Media and Wiki sources. It is important to differentiate "whose" (possessive) from "who's" (who is) to avoid grammatical errors. When looking for alternative phrases consider "Who does this book belong to?" or "Who owns this book?". Overall, "whose book is this" is best used to determine ownership of a specific book in a direct and clear manner.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Who does this book belong to?
Rephrases the question to focus on the act of belonging.
To whom does this book belong?
A more formal version using "to whom" instead of "who does".
Who owns this book?
Focuses on the ownership aspect with a direct question.
Whose is this book?
Simplifies the sentence structure by placing "whose" at the beginning.
Could you tell me whose book this is?
A more polite way of asking the question.
Can anyone identify the owner of this book?
Shifts the focus to identifying the owner, implying the owner is unknown.
Does anyone know who this book belongs to?
Asks if anyone has information about the book's owner.
Who is the proprietor of this book?
Uses the more formal term "proprietor" for owner.
Is this book yours?
Directly inquires if the book belongs to the person being addressed.
By whom was this book written?
Focuses on authorship rather than ownership, but relevant in identifying the book.
FAQs
How do I correctly use "whose book is this" in a sentence?
Use "whose book is this" when you want to know who owns a specific book. For example, "I found this book on the table, "whose book is this"?"
What is a more formal way to ask "whose book is this"?
A more formal alternative is "To whom does this book belong?" This phrasing is suitable for professional or academic settings.
What's the difference between ""whose book is this"" and "who's book is this"?
"Whose" indicates possession, while "who's" is a contraction of "who is". Therefore, ""whose book is this"" is correct for asking about ownership, while "who's book is this" is grammatically incorrect.
Are there simpler ways to ask ""whose book is this""?
Yes, you can use simpler alternatives like "Who owns this book?" or "Is this your book?" depending on the context.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested