Moritz Steinschneider’s online presence has been significantly augmented by the Jewish National Library’s Digitized Book Repository. They seem to have scanned all of his German books, as well as the Hebrew translation of his general work ‘Sifrut Yisrael’.

And also includes an interesting anecdote that

someone once told me how Prof. Moshe Bar Asher shut himself in a room for a couple of days, and emerged having taught himself Ugaritic.