References Brother Solutions Center: Scan Multiple Pages Into One File Instead of Each Scan Being Saved As a Separate File.

VueScan will scan several pages and save them to a PDF file. It's fairly simple to use once you've figured out the hooks in the UI.

Should I get a standalone scanner? A standalone scanner is only necessary for cases when you need to scan a document in really high detail, or scan multiple pages of a document quickly.

Tap the Add button if you need to scan multiple pages of the same document. Select Adjust Color or Crop & Rotate to make their respective adjustments. Once you're happy with the scan, tap Save.

Multi-Page, which lets you capture multiple pieces of paper into a single PDF document; Flash, which enables the flash so that it can illuminate the capture surface; and ...