The walk through Fides et Ratio is half-way accomplished. Caritas in Veritate comes next.
In the days gone by, encyclicals were read from the pulpit. With the coming of the printing press, encyclicals were made into pamphlets or little booklets and sold. This continued down to the present day, with one exception.
Many of the older encyclicals are out-of-print. I remember phoning a famous religious Catholic publishing house years ago for a copy of a 19th century encyclical and was told the house would no longer be printing that one, or any before the mid-20th century.
I was shocked, to be honest, that the one publishing company which had kept so many encyclicals in print was no longer committed to doing so.
Now, one has to look carefully for some encyclicals, all of which are infallible, of course, and not all of them are easily found online.
But here is a link to this excellent site, which I have used for this blog in the past.
If you are a homeschooling mom or dad, this site would be an important part of your curriculum sourcing. Other papal and Vatican documents may be found here as well.
The other great source on this superb site is the list of councils and the canons of these councils.
If there are any infallible or interesting teachings you want to know, please go to this site.