From the free Kindle version's product description for 13 Little Blue Envelopes:
Inside little blue envelope 1 are $1,000 and instructions to buy a plane ticket.In envelope 2 are directions to a specific London flat.
The note in envelope 3 tells Ginny: Find a starving artist.
Because of envelope 4, Ginny and a playwright/thief/ bloke–about–town called Keith go to Scotland together, with somewhat disastrous–though utterly romantic–results. But will she ever see him again?
Everything about Ginny will change this summer, and it's all because of the 13 little blue envelopes.
I loved 13 Little Blue Envelopes enough when I read it several years ago that I went out and bought it. It's sitting in the YA section of my bookshelves as we speak. Ginny, despite what she thinks, has more guts than I will ever have when it comes to taking off by myself, and Maureen knows how to write a great character to carry you alone for the ride. When I found out that the followup, The Last Little Blue Envelope, will be available on April 26th in hardcover and ebook, I even made a note on my calendar.
While I can't vouch for Wings because I haven't read it, apparently the publisher is aiming for the Twilight* set. From the product description:
For a limited time, the book that Twilight Saga author Stephanie Meyer lauded as "a remarkable debut" is available for free.
Laurel was mesmerized, staring at the pale things with wide eyes. They were terrifyingly beautiful—too beautiful for words. Laurel turned to the mirror again, her eyes on the hovering petals that floated beside her head. They looked almost like wings. In this extraordinary tale of magic and intrigue, romance and danger, everything you thought you knew about faeries will be changed forever.Apparently its about Fairies? Let me know if they're evil (I like 'em evil) and I'll check it out. Illusions, the conclusion to the Wings Trilogy, will be available on May 3rd, 2011.
*I know, I know, you can read. Thank you, Captain Obvious.