I have spring and fall. They follow the same format. The spring gives tips on doing nature study( each season includes this). There are pages of ideas for mammals, birds, nests, eggs, reptiles, insects--what to look for this season and some links. There are pages about spring weather with a few photos, links, poems. There are sections on plants with links, rocks, poetry, artists, music. There are pages related to the above themes that you can use for notebooking, or checklists/scavenger hunts for younger kids. I like them and am always inspired for nature study after reading one!
Marie