Probably one of the greatest works for spiritual progress, the Lam Rim Chenmo has been translated into three volumes.
This, the third volume consists of a lucid and well presented translation of the concentration and wisdom chapters.
The concentration chapter is a masterwork on developing the higher levels of meditative concentration, and being explicitly ecumenical, is relavant to anyone involved in meditation or mind training.
The wisdom chapter alone should be read and re-read by anyone who wishes have an unmistaken view.
His Holiness the Dalai Lama has been quoted as saying that this particular chapter is one of two expositions of emptiness that reveal the view.
In short, I cannot recommend this book highly enough.