Has anyone integrated quick books and recommend how to go about doing it?
In the past, I played around with Consolibyte’s Quickbooks PHP DevKit. It’s been many years hence, but the repo looks to be maintained still, and now seems to support the online version of QB along with the desktop version (the original one only supported the desktop version, IIRC):
This is not a CakePHP plugin by any means, so you would need to create your own interface to operate between your app and Consolibyte’s library.
If you only need to interface with QB online, you can use Intuit’s official PHP SDK:
Hopefully this is something to get you started on a few creative ideas 