I can recall reading an earlier edition of this book (which featured much smaller print!) back in 1990 or so and being quite impressed with it. Now after revisiting it in recent weeks (with this edition, in LARGE PRINT -- YAY!), I find myself being quite impressed all over again. The author provides a lucid and concise introduction to the Hermetic literature and worldview at the start of the book before translating and commenting upon selected hymns to the Supreme God from the Hermetic corpus. The language of the translated hymns is a bit archaic, but no more so than that of many Christian hymns that are still in widespread use. :) The commentaries to each hymn are, like the introduction, lucid and concise, setting each hymn within the context of the tractate that it was excerpted from and explaining allusions in the text that might be unclear for readers who are not familiar with the Hermetic literature.
All in all, this is a good introduction to Hermeticism through its poetry. I wish that a classical composer could set these hymns to music -- it would be very good for listening and/or chanting along! :)