My copy was published in 1967 by Julian Messner, a very reliable source for quality youth literature This particular biography by Manuel Komroff was co-written by Odette Komroff. Her addition surely was in understanding the character of Marie Antoinette, how it manifested and why, and how events in her life brought out the best and worst aspects of it.
After reading this, I felt like I understood her as a person and could almost empathize with her faults. Many of them were not of her making. She was the lighthearted, darling daughter of the Austrian Court. She was indulged, self-centered, and knew how to manipulate people in a charming way in order to get what she desired - and that by age 8-10. Those are hard lessons to unlearn as a teen or adult. The French Revolution and path to the guillotine did humble her soul eventually - continuing the work that had started when she had children and made them a huge focus in her life, to the extent that she put aside much frivolity.
I have read other biographies of her and many books on the French Revolution. This book stands out because of the portrayal of her character. Also it is a fine account of the Revolution itself, at least the first half.
I have read one or two of Manuel Komroff's other youth/teen biographies and have found them to be of excellent quality.
Marie Antoinette by the Komroff's is for independent reading at grades 6/7 to 12, and for adults not wishing to read an overly politicized, philosophical account of the times. Read-aloud to grades 4/5 to 8/9.