This is the review I posed on AMAZON so, I know, it sounds like an Advert.
http://www.amazon.com/Maitreyas-Sutras- ... dp_product
Decades ago The Ratnakuta or Jewel Heap Collection of Mahayana Sutras was publishes as A Treasury of Mahayana Sutras .... ALL of it was translated at the time, but only 40% of the sutras were released in the Treasury edition. That was a heartbreaking. It is a priceless compilation nevertheless, (see: A Treasury of Mahayana Sutras: Selections from the Maharatnakuta Sutra by Garma C.C. Chang - reasonably priced here on Amazon.)
Thanks to Lama Tony Duff we now have here astutely presented and scrupulously translated 2 previously unavailable crucial Sutras of the Buddha to Come - Maitreya.
This is the Real Deal, not New Age nonsense. And we also have a Vajrayana Buddhist commentary by one of Tibet's most respected.
Source of the Prayer of Maitreya, this represents money and study and meditation well spent.
A Treasury of Mahayana Sutras: Selections from the Maharatnakuta Sutra