Thank you for your interest in buying a Leanpub book.
We're sorry, but the only way to buy an ebook from Leanpub is through our website, using our credit card form, or the option to purchase via PaPal. We do not send out invoices in advance.
Please note that after you make a purchase, we do have a feature that lets you add company information to the purchase record, and send yourself a receipt that includes your company information. Here are the instructions for doing that: