On the heels of Amazon's new lower-cost Kindle, Sony has announced the launch of three e-readers that are slimmer and lighter than the company's previous models, with improved touchscreen technology. All three devices have E Ink Pearl paper-like displays that are readable in direct sunlight. Here are the details on each model:

The Pocket Edition has a 5-inch touchscreen and 2 GB of memory, enough to store up to 1,200 books. It comes in silver and pink. Cost: $179

The Reader Touch Edition has a 6-inch touchscreen and 2 GB of memory, along with dual expansion slots for adding up to 32 GB of additional memory. You can also play MP3 files and AAC audio files on the device, which is available in black or red. Cost: $229

The Reader Daily Edition
, which has a 7-inch touchscreen, provides a wireless connection to Sony's Reader Store  using AT&T's 3G network. It also has WiFi and basic Web browsing capability. Like the Touch Edition, it has 2 GB of memory with the ability to add up to 32 GB. It comes in silver. Cost: $299