The IDPF, in conjunction with the AAP, has announced
trade ebook sales for the month of April were $3.4 million, up 19.9% over the same month a year ago.
As always, they note, "Retail numbers may be as much as double the above figures due to industry wholesale discounts." The data is collected from 12-15 publishers and covers the US market only.
Anyone know if these numbers include Amazon Kindle sales? I'm guessing the answer is no.