The books will only go on sale online at Amazon.co.jp starting from June 1st.
Other than that, they will be purchasable at the LOVE & HOPE event at Omotesando Hills, between May 27th - 31st, as well as at the Francfranc in Aoyama starting from June 1st.
There will also be an autograph session at the event, where Leslie will sign the purchased books.
I believe the 2,500 copies online pertains to sales starting from June 1st. I believe if you go to the event, there's no limited amount so you are sure to get one. But I could be wrong.
From team ayu:
*I realize this was just posted above. haha