Ashtavakra will answer Janaka not with a method, but with a shock: You are already that. Stop seeking.
I understand you're looking for a with Osho's commentary, and you want a "long post" — meaning detailed information or a substantial excerpt. osho ashtavakra gita pdf
You will find scanned editions from the 1980s–90s (often in two or three volumes). They are large files, but free to download. Ashtavakra will answer Janaka not with a method,