Spoiler warning: this post explains the full ending of Z for Zachariah. If you have not finished the book, stop here and come back later.
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Quick answer: Ann Burden, who believed she was the last person alive after a nuclear war, escapes from John Loomis, the scientist who tried to control and assault her. She steals his radiation-proof suit, leaves her sheltered valley and walks out into the dead land, hoping to find other survivors, perhaps children, in the west.
Quick facts
– Book: Z for Zachariah by Robert C. O'Brien
– First published: 1974
– Type: A young adult post-apocalyptic novel
– Tone of the ending: Hopeful and lonely
Table of Contents
What Leads Up to the Ending
Sixteen-year-old Ann lives alone in a valley that was protected from fallout by its unusual weather. Her family left to look for others and never returned. One day a man in a green safe-suit arrives: Loomis, a chemist who designed the suit. He becomes sick from radiation after swimming in a contaminated stream, and Ann nurses him back to health.
What Happens at the End of Z for Zachariah
As Loomis recovers, he becomes controlling. Ann learns he shot his colleague Edward to keep the suit. He tries to assault her, and she hides in a cave. He hunts her with a gun, wounds her and burns her food supplies. Ann tricks him and takes the suit. He begs her not to leave him alone. She tells him she will go. She sets out, hoping to find people.
The Ending in 4 Quick Points
- Loomis killed his colleague.
- Ann takes the suit.
- Ann leaves the valley.
- Her future is uncertain.
What Happens to the Main Characters
| Character | What happens to them |
|---|---|
| Ann Burden | Leaves the valley |
| John Loomis | Left alone |
| Edward | Killed by Loomis earlier |
What the Ending Means
The ending shows Ann choosing freedom and hope over safety with a dangerous man.
Other Ways to Read the Ending
Some readers see Loomis as a symbol of the science that destroyed the world. Others focus on Ann's courage.
Themes the Ending Brings Together
Survival. Ann survives alone.
Power. Loomis seeks control.
Hope. Ann believes others survive.
Is the Ending Happy or Sad?
Most readers describe the ending of Z for Zachariah as hopeful and lonely. How you feel about it usually depends on what you hoped for the characters and what you expected Robert C. O'Brien to do with the story, so it is worth asking friends how they felt before you compare notes.
Who Will Like This Ending
Readers who enjoy endings that are hopeful and lonely will find a lot to talk about here. If you prefer every thread tied up neatly, it helps to know in advance how Robert C. O'Brien closes the story, which is exactly why many readers look it up. Either way, the final chapters reward a second look once you know where everything is heading, because small details from the middle of the book start to matter. If you are reading with a group, agree beforehand whether everyone has finished, so nobody has the last chapters spoiled.
Book Versus Adaptation
The 2015 film changes the story, adding a third survivor and a love triangle.
Discussion Questions About the Ending
If you are reading Z for Zachariah with a book club or a friend, these questions work well once everyone has finished:
- Did the ending surprise you, or had you seen it coming from the first chapters?
- What does the final scene say about survival, and do you agree with Robert C. O'Brien's view?
- Which character made the most important choice in the last part of the book, and was it the right one?
- How would the story feel if it had ended one chapter earlier or one chapter later?
- Does the ending leave you hopeful about the characters, or do you worry about what comes next?
- Would you describe the ending as hopeful and lonely, or would you choose a different word?
How to Read the Final Chapters Again
- Compare the opening with the close. Look at how the first chapter introduces survival and how the ending answers it.
- Track each final choice. The table above shows where every main character ends up, so ask which of those outcomes was earned.
- Notice what Robert C. O'Brien leaves unsaid. Gaps in the last pages are often deliberate, and they are where most of the debate about the ending begins.
- Listen for echoes. Images, phrases or settings from earlier in Z for Zachariah often return in the final scene with a new meaning.
Questions to Ask Yourself After Finishing
- Was the ending of Z for Zachariah earned by what came before it, or did it feel sudden?
- Which character's final moment affected you most, and why?
- If you could change one thing about the last chapters, what would it be?
- Did the ending change how you think about the opening pages?
Check price of Z for Zachariah on Amazon
Books to Read After Z for Zachariah
- The Road by Cormac McCarthy
- Earth Abides by George R. Stewart
Related: Z for Zachariah by Robert C. O’Brien: Summary and Key Takeaways · What Age Is Z for Zachariah Appropriate For? A Parent’s Guide
Frequently Asked Questions
What happens at the end of Z for Zachariah?
Ann Burden, who believed she was the last person alive after a nuclear war, escapes from John Loomis, the scientist who tried to control and assault her. She steals his radiation-proof suit, leaves her sheltered valley and walks out into the dead land, hoping to find other survivors, perhaps children, in the west.
Is the ending of Z for Zachariah happy or sad?
Most readers call it hopeful and lonely.
What does the ending of Z for Zachariah mean?
The ending shows Ann choosing freedom and hope over safety with a dangerous man.
Is the ending of Z for Zachariah the same in the adaptation?
The 2015 film changes the story, adding a third survivor and a love triangle.
Who wrote Z for Zachariah and when was it published?
Z for Zachariah was written by Robert C. O'Brien and first published in 1974.
Is Z for Zachariah worth reading if I already know the ending?
Yes, especially if you enjoy young adult post-apocalyptic novels. Knowing the ending can make a first read richer, because you notice how Robert C. O'Brien prepares for it from the opening chapters.
Should I read Z for Zachariah before reading the ending explained?
Yes, if you plan to read it, because this post gives away the whole ending.