Half Lost is a 2016 young adult fantasy novel written by English author Sally Green.

Forced to consume his father's heart, he must now learn to master his many new gifts that might be the now-decimated Alliance's only hope for survival.

Nathan's last chance to defeat Wallend, Soul and their army of Hunters is to find the reclusive black witch Ledger and convince them to give him the second half of Gabriel's amulet so that he might become invincible.

His body is cicatriced by scars from long healed wounds, including severe burns on one of his wrists and a "BW" carved into his back by Kieran O'Brien.

He also has six tattoos that were magically branded onto him by Mr. Wallend in order to make a witch's bottle.

After gaining her Gift (Shape-Shifting), she joins the Hunters and ascends their ranks, eventually becoming their leader.

She faces some time in prison for her killing of Marcus, where she gives birth to Nathan's son, Edge.

Nathan hates her and is initially hesitant to be a part of any Alliance with her; however their relationship eventually grows closer and less strained.

Half Lost has received predominantly positive reviews—though the audience has been strongly divided over the ending to the series.

I don’t even exactly know how I feel about it myself; I’m still reeling and bewildered, to be honest...Overall, I did think this was a strong finish to the series.

"[3] - The Guardian review "Green’s portrait of Nathan as a damaged mixture of good and evil, a sort of well-meaning monster, is masterly, and the series’ intensity and the author’s willingness to put her characters through enormous pain and transformative loss haven’t changed a bit.

"[5] In 2020, it was announced that Netflix was producing a TV adaptation of the Half Bad trilogy, helmed by Joe Barton.