The menu system utilized to access the books can be difficult to understand. It could have been simpler in design, if only the various books themselves had fallen into one larger overriding category. Such, however, is not the case. This site will eventually house books covering those states for which there have been district histories and other more generalized books.
In the case of the various district histories there are many states that are split into three, or more, districts. Pennsylvania has four districts: Eastern, Middle, Southern and Western. And, each district may have more than one published history; such as the 1920 and 1955 histories for the Southern District of Ohio. Thus there will be under the District menu link (when it is created) a link for Ohio > Southern District > 1920 as well as a 1955 menu item. The menus will be logical in nature so that should be fairly easy to follow.
Such may not be the case for other Brethren historical works. For instance, as of this writing there are two books online, The Minutes of the Annual Meetings of the Brethren — 1778 - 1917 and Some Who Led — Or — Fathers in the Church of the Brethren Who Have Passed Over. One book is a biographical work while the other is non-biographical in nature. Thus under the General menu link there will be a sub-menu item for each, Biographical and Non-biographical.
The only other envisioned menu item is one entitled "Congregational," or named something alike it, for the various and numerous congregations for which there are published histories.