The method for learning Latin developed by Hans Ørberg is also known as the natural approach or contextual induction.
The main book is called: "Lingua Latina Per Se Illustrata" which contains only Latin text, but also some small explaining figures and marginal notes in Latin. See the series here
What is the current status of Hans Ørberg's natural approach method for learning Latin?
- Is it still being used?
- Does it still work?
- Does it have some known drawbacks?
- And has it been expanded in any way by other authors?