The Four Shelves: The Author With the Boxed Set, the Poet, and the Author Whose Book Holds a Postcard

Four shelves stand in a row, numbered 1 to 4 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 cloth-bound edition is the author whose book holds a pressed leaf. 2. The author with the cloth-bound edition is directly next to the author with the hardback. 3. The author with the leather-bound edition is the historian. 4. The historian is immediately to the right of the author with the boxed set. 5. The memoirist is directly next to the author whose book holds a ticket stub. 6. The author with the boxed set is the poet. 7. The memoirist is the author whose book holds a postcard. 8. The historian is the author whose book holds a ribbon bookmark.