Subjects include snow crystals and snow ecology, birds' nests and winter bird behavior, evidence of insects, animals tracks and signs, winter weeds and wildflowers, evergreen plants, and wintering trees.
Knowing the trees can help one have successful mushroom hunts. Another good guide is Trees and Shrubs of Virginia, by Oscar W. Gupton and Fred C. Swope.
My childhood library was small enough not to be intimidating. And yet I felt the whole world was contained in those two rooms. I could walk any aisle and smell wisdom.