For Osho, a chakra is not a light you visualize; it is a feeling . Close your eyes. Feel the base of your spine. Do not judge the energy there. Simply witness it. This is Osho’s "No-Method" method.
Offers a 240-page Turkish version titled "Osho - Çakra Kitabı". Internet Archive Hosts the English version, The Chakra Book.pdf , which is part of a larger collection of Osho’s works. Google Drive: Osho cakra Kitabi Pdf
You can find a PDF version of the book via this Google Drive link. The book covers: For Osho, a chakra is not a light
: The importance of the heart chakra as the transition point between the physical/earthly chakras and the spiritual/divine chakras. Do not judge the energy there
: Detailed explanations of each energy center, from the Root (Muladhara) to the Crown (Sahasrara).