This is an old book, but one that I found insightful (as is most stuff that Godin writes).
Sida dhabta ah waa kitaab mudan in la xafdisiiyo dhallinta soo koreysa, waxaanna filayaa qofkii si fiican u fahma inuu wax weyn ka tari doono dadnimadiisa iyo aayatiinka noloshiisa inta uu jiro..