~ Matahari is the third novel in the Bumi series which was first published in 2016. This novel no longer tells the story of exploring the Matahari clan, but tells Ali's curiosity about exploring the womb of Earth so that he finds the existence of another clan, namely the Bintang clan.

At first, Ali was just curious, then brought his two friends, namely Raib and Seli, to realize Ali's curiosity by inviting them to explore the womb or bowels of the Earth. Until finally, they managed to find out about the existence of the Star clan.