Yes, you can get an invoice with custom information, like your company name and address, after you make a Leanpub purchase.

when you complete a purchase from Leanpub, you will automatically receive a receipt via email.

After the purchase is completed, you can add your organization's information to the purchase record, and send yourself a second, new receipt for the same purchase, with your organization's information included on the receipt.

You can save your company information on your Leanpub account, so it will be included automatically on all of your future purchases.

Here are the instructions for what to do, after you have completed your purchase:

http://help.leanpub.com/reader-help/i-need-to-add-company-information-to-my-receipt-how-do-i-do-that

Please note that Leanpub does not send invoices in advance of any purchase.