The next-generation Kindle e-reader is filled with tons of improvements over its predecessor, including twice the storage capacity, from 8GB to 16GB. That may not sound like a lot, but books are small, so this increase allows for thousands more. 

Pre-orders for both models start today and will ship on October 12. The standard Kindle costs $100 and the new Kindle Kids edition costs $120 (likely to account for that lengthy subscription).

9/14 Correction: Updated the standard Kindle link in the final paragraph to point to the correct page.