As in: read 3 more books in German and 3 more in French, read one major work in Latin, read a major work in Greek and read 3 books of the Bible in Hebrew, as well as two medieval texts and one work by each of Jung and Freud (separate from the 3 German books).

That makes about 15 books for a challenge...if I threw in a few others and then left myself some "free" spots to read whatever I felt like at one time or other, then I could get to a 30-book challenge, which is far better for me than 50-book challenges given my time constraints.

Of course, the reader who loves a challenge in me is tempted to make the Greek book The Iliad, the Latin one Ovid's Metamorphoses and the Bible books Job, Isaiah and Daniel (the latter of course forcing me to exercise my Aramaic), pick Die Traumdeutung as the Freud work, Mysterio Coniunctionis as the Jung work, and La Divina Commedia as one of the medieval works.