Gareth Cockerill's commentary on Hebrews for the NICNT is superb. He does an excellent job at introducing his own take on the numerous difficult questions concerning this Epistle--namely, who wrote it, to whom was it addressed, when was it written, etc. Cockerill's comments on each section and each verses are insightful and astoundingly thorough. I also appreciated his willingness to interact with--both in agreement and in disagreement--many other articles, books, and monographs on the subject from a variety of different authors. Cockerill, rather than simply regurgitating everyone else's insights, comes through with his own unique style, interpretation, and assessment of Hebrews. I would highly recommend this to anyone taking a class on the Epistle to the Hebrews or who is exegeting a passage from Hebrews for a class discussion, church gathering, or the like.