The book says not to desire liberation. Does this mean that the path of Sai Baba is against achieving spiritual freedom or Moksha?

The text does not suggest that liberation is a negative goal, but rather that devotion is a higher or more immediate one for the devotee. In Chapter 50, a prayer is mentioned where devotees state they have no desire for the four types of liberation, such as Salokata. The supreme attainment sought is 'steady devotion to Sai.' The passage further questions the concept of bondage itself, asking, 'We were never bound in the first place; what connection do we have with liberation?' The primary focus, as described in Chapter 50, is on achieving a pure heart through the awakening of devotion to the Saint, which is presented as the supreme attainment.