Plutarch is generally known for his Parallel Lives, but he was also a Platonist philosopher who contributed some of the few complete works of Middle Platonism that we still have extant. While Plutarch may not always be the most innovative or consistent, I found this collection of essays incredibly engaging. The first essay simply deals with Platonic problems; and the second explores the Timaeus and it's discussion of psyche.
The editor/translator is not afraid to mention Plutarch's errors and inconsistencies in the running commentary/footnotes. Going back and forth between both is a bit tiresome; so I would probably suggest reading the actual work once through and then reading the editor's footnotes. I think the editor, as many have done, attributes to Plato more consistency than he actually had. Not that I take the Straussian view that Plato never voiced his own views in his dialogues, but I do think he may have voiced disparate views by his various interlocutors. In some cases, Plato may have changed views, and in others, he may have been undecided and simply provided various opinions on a given subject. Later interpreters and expositors probably made choices between these disparate views and accepted them as Plato's.
I do highly recommend this book for those interested in Platonism and it's historical development. Loeb, I do believe, has the only translation of this work of Plutarch's, which includes the Greek with the English. While copies still are available, it might be advisable to procure one for those interested. ( )