April 2011 e-book sales came in at $72.8M, slightly up from March’s $69.0M, but well below February’s record $90.3M (past months’ data can be found here). This is up 165.7% from last April’s total of $27.4M.

April 2011 e-book sales: $72.8M

Prior months’ totals:

• Apr 2010: $27.4 M
• May 2010: $29.3 M
• June 2010: $29.8 M
• July 2010: $40.8 M
• Aug 2010: $39.0 M
• Sep 2010: $39.9 M
• Oct 2010: $40.7 M
• Nov 2010: $46.6 M
• Dec 2010: $49.5 M
• Jan 2011: $69.9 M
• Feb 2011: $90.3 M
• Mar 2011: $69.0M
• Apr 2011: $72.8M

In comparison to print, e-books were the #3 trade book format this month (they topped all formats back in February), behind adult hardcover and trade paperback, but still well over double adult mass-market paperback. For print:

• Adult hardcover: $111.4M
• Adult trade paperback: $95.9M
• Adult mass-market paperback: $28.5M
• Young adult hardcover: $41.2M
• Young adult trade paperback: $36.8M

In total, e-books accounted for 18.8% of all trade book + e-book sales, down from nearly 30% in February, but still a healthy percentage that is more than double last year’s average of 8.2%.