The Five Shelves: The Author With the Leather-bound Edition, the Poet, and the Author With the Black Cover
Verified— unique solution
zebra
Five shelves stand in a row, numbered 1 to 5 from left to right. Each holds exactly one of each attribute, and no attribute repeats. Work out the full arrangement from these clues:
1. The author with the green cover is immediately to the right of the author with the gold cover.
2. The science-fiction writer is immediately to the left of the author whose book holds a receipt.
3. The author whose book holds a pressed leaf is immediately to the right of the author with the hardback.
4. The historian is immediately to the right of the author with the gold cover.
5. The cookbook writer is immediately to the right of the author whose book holds a receipt.
6. The author with the spiral-bound edition is somewhere to the left of the cookbook writer.
7. The author with the boxed set is not the poet.
8. The science-fiction writer is somewhere to the left of the author whose book holds a ticket stub.
9. The author with the hardback is not the author with the red cover.
10. The mystery writer is not the author with the red cover.
11. The author with the white cover is not the author whose book holds a receipt.
12. The author with the hardback is immediately to the left of the author with the black cover.
13. The author whose book holds a ticket stub is not the author with the hardback.
14. The author whose book holds a ticket stub is immediately to the right of the author with the boxed set.
15. The author whose book holds a ribbon bookmark is immediately to the left of the author with the cloth-bound edition.
16. The author whose book holds a receipt is not the author with the red cover.
17. The author whose book holds a ticket stub is not the author with the red cover.
Hints
Hint 1
Hint 2
Hint 3
Solution
Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.
In the final arrangement, which numbered shelf (1–5) does “the author with the white cover” end up at? Answer with the number.
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