A look at the PDF of the Morin edition of this work by Jerome reveals 100 pages. The comments are all fairly short.
I’ve been looking to see what translations exist. An edition exists in the Corpus Christianorum from Brepols (CCSL 72, 100 euros), but since the editor given is Morin I suspect this is really a reprint. A German translation does exist here, from 2005, which advertises itself as the first into a modern language.
Is there an English version? Would one be interesting?
I’ve worked out that a page might be about 180 words, and the whole work perhaps 18,000, across 100 short pages. The Latin is easy enough. Perhaps I should commission a translation.