For you I recomend a reader from the company Aluratek.

Aluratek has different readers you can research them in their website my favorite is the Libre eBook Reader Pro and get a memory card of 16 or 32 you can read different formats and its also a Mp3 player. You can get it cheaper in other websites so do a price compare. I love it was my second and favorite reader till iPad. It's a $60.00 or less price. But compare book sellers before you deside what to buy because not all readers can synk. Compare book sellers prices and formats. Read user reviews and their are a lot of comparison online research it. Aluratek works like an USB so it doesn't mater your speed or connection.