I have signed off on the interior, cover, and pricing for The Earthworm That Blows No Trumpet. iUniverse says it's usually 15 to 20 days between approval and availability.
You should be able to purchase the hard copy or e-book around the first week of June. It won't be in your neighborhood bookstore, but you can order it through iuniverse.com, amazon.com, or barnesandnoble.com. If you search by author's name, I recommend using the whole name David Bruce Collins, because searching by just David Collins gets 224 hits, and I'm not responsible for all those books.
The one book currently on Barnes & Noble that I did actually write still has one review from 2001, and it's a five-star review. No, I didn't write the review, but I give it five stars too. ;-)