Geologic Periods Book Set

Each book in this set moves through the characteristics, land formations, climate, and species particular to the period, closing with the event that ends the period. Includes 13 books, one for each period on the Time Line. Written by Montessorians Doug and Claudia Mann and designed as an extension to the Time Line of Life, this set offers children many opportunities to solidify their understanding and expand their research. Invaluable additions to your library, all books are updated with current terminology and scientific developments. Paperback.