Available for pre-order to be released on March 6 are:
Gently Where the Birds Are
Gently With Love
Gently Instrumental
Price is $7.89 at
Kobo US, $9.57/9.59 at
Amazon.com.
Got all the previous ones at Kobo with coupons but pre-orders do not seem to accept coupons. The Paypal payment option seems to have disappeared from the US checkout and any Kobo purchase on my credit card generates a suspected-fraud phone call from my bank so that has become a nuisance.
[edit]
Gently Sinking will be available April 3, 2014 on Amazon US price $9.55