Short answers, pulled from the story.
The Moralia is a set of seventy-eight distinct essays and dialogues written by Plutarch of Chaeronea in the 1st century. These texts range from serious philosophical treatises to humorous dialogues like Odysseus and Gryllus.
The oldest surviving manuscript containing the full list is Parisinus gr. 1678 which dates to the tenth century. This copy was very damaged before a second hand of the twelfth century intervened to add the missing text.
Scholars label certain texts as Pseudo-Plutarch because they contain thoughts not actually his own and come from a slightly later era than the main collection. Examples include On Fate, Lives of the Ten Orators, On Music, and On the Opinions of Philosophers.
Plutarch's five Spartan lives and Sayings of Spartans serve as some of the richest sources for historians of Lacedaemonia since Spartans wrote no history prior to the Hellenistic period. However, many ancient customs he reports had been long abandoned so he never actually saw what he wrote about, leading to myths about Spartan egalitarianism.
This text explains how the letter E written on Apollo's temple originated from five genuine wise men rather than seven tyrants who used political power to be incorporated into the list. The dialogue features Ammonius a Platonic philosopher and teacher of Plutarch alongside Lambrias his brother.
Several chapters appeared in England until the complete Moralia with eight chapters was published in August 1514 in Basel by Johann Froben. Five editions of Erasmus's translation were printed by Froben between 1514 and 1520 ensuring wide dissemination across Europe.