Class B power amplifier
Brian is right. This is not a complete circuit. Do not bother attempting to analyze the quiescent conditions of this circuit.

For the record, as drawn, if \$V_i\$ is greater than 0.6V above \$-V_{CC}\$, then the collector of \$Q_3\$ will be near ground and \$Q_2\$ will pull the output voltage down toward \$-V_{CC}\$. Grey and Meyer are well-respected, but maybe write for an advanced audience. I am sure that when presented in full context, everything makes sense.