I bought both of them.
Common sense i’ve not read yet but the little book yes, and is very instructive about passive investment although very focused from a US person perspective.
Also I bought a couple more books : the quest for alpha, how a second grader beats wall street, millionaire expat (i think is the best with a global perspective), unconventional success a fundamental approach to personal investment (a very very good one from the Yale endowment fund CIO David Swensen with a interesting portfolio to replicate)