Complex sentence: Despite these criticisms, "The Passion of Ayn Rand" had no direct competition until the first authorized biography appeared in 2004; its author, Jeff Britting, had access to much material controlled by the Estate of Ayn Rand.
Split into simpler sentences: Despite these criticisms, "The Passion of Ayn Rand" had no direct competition until the first authorized biography appeared in 2004. The authorized biographer, Jeff Britting, had access to much material controlled by the Estate of Ayn Rand.