The fourth game in the Picross e series, e4, is heading to the 3DS eShop in North America. It'll drop in May, and will feature new 20x15 puzzles, as well as tutorial options for newcomers. Micross and Mega Picross modes are also said to be featured, as well as more than 160 new puzzles.
You can also unlock special puzzles with save data from past games. Yep, this is all sounding pretty great. You really can't go wrong with Picross so long as you enjoy the premise.
Picross e4 [Nintendo]