The product of six months of work (on text, photos, line drawings, proofing, and formatting), we are proud to present the Mercury User Guide. It includes an introduction to the Mercury system, a reference guide for components and how to configure them, many illustrations of example configurations, a complete chapter on shooting with Mercury aimed at newcomers to medium and large format photography, explanations of different lens systems, suggestions for expanding your Mercury, and much more! You can download it here.