Conversation so far:
What year did Lou Gramm leave Foreigner?
Gramm decided to leave the group in May 1990.
Why did Lou Gramm leave Foreigner?
Gramm announced his departure from Foreigner in May 1990 due to differences with Jones, and to focus on his solo career.
What work did Lou Gramm do as a solo?
Gramm released Ready or Not as a solo.

Question: What year was this?
Self-contained rewrite: What year was Lou Gramm's solo Ready or Not released?