Is this figure of quasiconvex function correct? (Figure 3.10 in Nonlinear Programming by Bazaraa, Sherali, and Shetty)

Question

I was looking for a clear definition of quasiconvex functions and came across Figure 3.10 in Nonlinear Programming by Bazaraa, Sherali, and Shetty 2006. I understand a property of of quasiconvex functions is that they are unimodal around the minimum. Figure 3.10a is this case shows two minimums which clearly violates the unimodality property and even violates the definition listed in the book. Could someone kindly comment whether this figure is correct or not?