Ask HN: UX design materials for line of business applications?

Can anyone recommend UX design materials relevant for data-driven web applications?

I'm currently working on a line of business application.

Users will be performing the same tasks repeatedly, inputting and reviewing a lot of data to get their job done. They will spend their entire working day using this application. It's usage is closer to something like Excel than a traditional form/wizard based workflow.

Speed of review and input are obviously really important, and I can assume that users will become familiar with it (although learnability is very important).

Most UX materials I've come across are for consumer web applications or tools. The user isn't expected to sit in the application all day and use it for everything. Additionally, they focus more on form-based or workflow tasks.

I know all of the principles are the same but I'd love examples of LOB web applications that are a pleasure to use.