What is the anime/manga where people die are brought back to life and forced to fight by some strange machine?

Theres this manga and anime thats abotu people who die and are brought back to life to fight and do missions for a robot machine thing

Gantz!
Loved it but too bad they stopped producing it after the [...]

Learning to draw. Where or how can I learn to draw in the style of comics / manga?

After watching Heroes I thought I would quite like to be able to draw like Isaac’s character (although obviously without the predicting the future bit)
For those who don’t watch Heroes Isaac draws/paints/sketches in a comic book / manga [...]