Hi, lurker here.
It seems as though you desire a definitive, one-work contains all summary of canonical doctrine (I assume, in a form that may be similar to the Catechism). The closest documents I know of are the
True to the Faith gospel reference book, and the Sunday School manual
Gospel Principles, both of which missionaries (including me) have used to explain even more complicated doctrines to inquiring potential members and new members, in a simple, concise manner.
It may not be a full-scale doctrinal treatise on the level of, say, Talmage's
Jesus the Christ, but it goes a long way towards summarizing our doctrines in one location.