Oliver Smith

A Kindle Paperwhite or Kobo Clara 2E fits your budget and both let you make the text large increase bold/weight, and use a warm front light; they’re e‑paper, so porch sunlight won’t glare. On either, bump line spacing and margins a step and try a heavier font like Ember Bold or OpenDyslexic, plus dark mode at night for gentler contrast. If touch targets feel small, a simple grippy case and larger tap zones make page turns easier.