If you’re still looking for that perfect Mother’s Day gift idea, Amazon has their popular Kindle Paperwhite e-reader on sale for $40 off (29%) at $99.

This discount is better than the regular $20 off which popped up a couple weeks ago, and matches the $40 off from early April, which was limited to Prime members only.

What makes the Kindle Paperwhite so great for reading is the 6-inch touchscreen display (300 ppi) is powered by a front-lit light, instead of backlit like an LCD. This means you have less eye strain over long periods of reading.

Also, Amazon has a WhisperSync feature which syncs your bookmarks to the cloud, so you can continue reading from any device, including your iPhone and iPad. With 4GB of storage you’ll be able to store a tonne of e-books, while battery life “lasts weeks”.

Click here to jump on the Amazon Kindle Paperwhite while it’s still on sale for $99—mom’s going to love it (and if she doesn’t, Amazon will let you return it).