For a long time, we used to sell the 200+ pages jPOS Programmer's Guide for a fee as part of the program to support jPOS.org and you can still purchase it (see below), but we are working now in a new version of the documentation that covers the latest jPOS and we want it to be free.
So for every purchase of the existing guide, we spend time working in the new free one.
The new guide draft is available for free here and now.
You'll see that it just cover a few chapters, which are very useful to get you going.
If you want to expedite the development of the new guide, and you want access today to the old guide (even though it covers version 1.6 of the jPOS, users say it's a great must-have resource), or just want contribute back to the project, you can click the "Buy Now" button below to get it.
Payments are processed by PayPal and while not always apparent, regular credit cards are accepted without the need to sign up for an account.
Download information will be sent to you via e-mail to the address you enter in the order form. PLEASE NOTE that the e-mail delivery is performed manually after receipt of an order and is therefore associated with a short delay (typically 12 to 24 hours). The e-mail will be sent from noreply@jpos.org. Make sure to white list this address in order to avoid our e-mail ending up in your junk folder. If PayPal is not available in your country, please contact sales@jpos.org for an alternate payment methods. Do not hesitate to Contact us if you need further assistance. Make sure to leave a phone number just in case there's an issue reaching your e-mail address.