A bit dated, but a great general introduction to the Witnesses:
The book by the same name can be read online here or downloaded here.
¡En español!:
For further reading:
Reading Recommendations re: Jehovah’s Witnesses

A bit dated, but a great general introduction to the Witnesses:
The book by the same name can be read online here or downloaded here.
¡En español!:
For further reading:
Reading Recommendations re: Jehovah’s Witnesses