The rerelease of Steve Jackson's Sorcery series is coming to Windows and OS X episodically from inkle beginning at the end of this year. They also announce a fourth installment is being developed to cap this off following the release of the original three games. A Sorcery! website has details, and here's an overview:

Spun off from the beloved gamebooks of the 1980s, Steve Jackson's Sorcery! takes players on an epic fantasy quest to recover the stolen Crown of Kings. Playing as either a male or female hero, explore a beautifully illustrated world filled with unique and memorable encounters, vicious traps, magic spells, strategic turn-based combat, and moral tests that can make or break a hero. Every decision you make is used to pen your own distinct adventure, and with each installment building on the last, you can continue with the same character to experience story outcomes in later games related to choices made early on.

Sorcery! Parts 1-3 will release about once a month, on a schedule to be announced soon. A fourth and final Sorcery! installment is under development for PC and Mac as well as iOS and Android.