Mel B and Geri Halliwell are to have their new books published on the same day.
Scary Spice has written Catch A Fire, based on diaries she has been keeping since she was 13.
And her former fellow Spice Girl Geri has completed a second autobiography called Just For The Record.
It's a follow-up to If Only about her early life and the Spice Girls, reports The Sun.
Both books are due to hit the shops on September 2.