You could always go to fellow Textkitten edonnelly's site
, and download PDF copies of some of the classics.
Well that, of course, is a brilliant idea!
Actually, from what I read in the original post, the best option may be one of Latin Books with Keys
. There are several composition books there for latin learners of different levels. Personally, I think composition books without answer keys are useless, which is why I list all the books I could find keys for in their own section.
Another option is North and Hillard's Latin Prose Composition
which also has a key
, both of which are hosted right here on textkit. It's rather challenging, though, so depending upon exactly what one wants to learn, it may be better put off until later.
Wheelock's (a book you can buy) and D'Ooge's
(a freebie) are standard latin text books. That is, they will introduce a concept, have some latin->english exercises, some english->latin ones and then a story or so to translate. These are both good books, but my guess is that depending upon how much you've learned from LL, they may be a little tedious, covering lots of material that you already know. A pure composition book, though, can really zero in on a lot of the subtleties that are hard to extract from either LL or the more traditional texts. Anyway, the great thing is that there are tons of options, the majority of which are completely free, so you can look around at a lot of stuff to find which best matches your needs.