Here are my favorite box sets (not really new releases):
The How To Series by Mia Marlowe (originally published by Dorchester under the name Emily Bryan).
Captain Lacey Regency Mysteries Vol 1
Three Timeless Loves: A Scottish Time Travel Romance Boxed Set.
The Sweet Temptations Collection by Marilyn Brant.
The Emily Chambers Spirit Medium Trilogy Boxed Set
All of the above I got for .99, the first two are still that price, but the last ones have gone up in price since then.