I would especially emphasize English Translations of the Chafetz Chaim's halachic works. The Chafetz Chaim writes in a style that is semi-halachic and semi-exhortative and simple. Some very good works of his that come to mind are:
- Ahavath Chesed
- Shimrath Lashon (With Beer Mayim Chayim and Makor)
All these are now in both English and Hebrew.
Russell