According to Osho, his earlier books are living roots of the same tree that is flowering in his present words: indispensable foundations that nourish and contextualize his evolving expression of truth. Truth is alive, so don’t freeze it into doctrines or compare yesterday with today; use past writings for grounding and continuity while staying available to the deeper, more potent insights unfolding now.
His old books feed and support his new talks like roots feed flowers; they help, but don’t treat them as fixed rules.