I have just bought the Kobo Libra 2 and I am very impressed, I have been using a Gen2 Kindle forever but finally decided I needed one with a backlight. Libra 2

I have just bought the Kobo Libra 2 and I am very impressed, I have been using a Gen2 Kindle forever but finally decided I needed one with a backlight. Libra 2 is waterproof and seeing as I frequently read in the pool on holiday or in the hot tub etc this was a great feature for me. For your specific use case I would look at something like the ReMarkable or Supernote as they are almost A4 sized readers and would allow you to annotate the papers etc