Complex sentence: An overview of walking in Greece, including sections of E4, can be found in "The Mountains of Greece" by Tim Salmon and there is a guide book in German to the E.4 in the Peloppnnes by Rolf Roost (see bibliography).
Split into simpler sentences: An overview of walking in Greece, including sections of E4, can be found in "The Mountains of Greece" by Tim Salmon. There is a guide book in German to E.4 in the Peloppnnes by Rolf Roost (see bibliography).