Formal:
* J'aime lire. (This is the most common and literal translation)
Informal:
* J'adore lire. (This translates to "I love reading" and is more emphatic)
* Je kiffe lire. (This is a more casual and slang way to say "I like reading")
You can also add more context to your sentence, like:
* J'aime beaucoup lire. (I really like reading)
* J'aime lire des romans. (I like reading novels)
* Je prends plaisir à lire. (I take pleasure in reading)
The best way to say it depends on the situation and your personal preference.