
Apprentice Adept
science fiction
Series · science fiction
The Mode series by Piers Anthony has 4 books and is best read in publication order, starting with Virtual Mode (1991).
Start here: Virtual Mode (1991) — then read straight through in publication order.

The order the books were released — the default way to read the series.
Colene, a suicidal teenage girl from Earth, discovers a portal into Proton/Phaze, the paired science-fiction-and-fantasy world at the center of Piers Anthony's Apprentice Adept series, and falls in love with Darius, a man trapped between realities. Anthony spins this connection into a new four-book arc that pushes the underlying premise of Apprentice Adept even further: rather than two linked worlds, the Mode series proposes an entire structure of alternate realities — 'modes' — each governed by different physical or magical laws, which Colene and Darius must navigate to find a way to be together and to solve the crises threatening the worlds they pass through.
Where Apprentice Adept alternated cleanly between its two paired settings, Mode widens the scope considerably, introducing new realities with their own internally consistent rules each book, while keeping Colene's personal arc — her recovery from suicidal depression and self-harm, treated with unusual directness for the genre — as the emotional throughline connecting the more expansive world-hopping plot. It functions as a loose sequel series to Apprentice Adept, expanding that series' central conceit rather than continuing its original cast's story directly.
Publication order, starting with Virtual Mode. The four books follow Colene and Darius's relationship and their journey through a widening set of alternate realities, with each volume building directly on where the previous one left off.
This series connects to Piers Anthony's Apprentice Adept series (set in the same Proton/Phaze universe) but can be read independently — familiarity with Apprentice Adept adds context but isn't required to follow Colene and Darius's story.
Four novels, published between 1991 and 2001: Virtual Mode, Fractal Mode, Chaos Mode, and DoOon Mode.
Publication order, starting with Virtual Mode. The four books follow a single continuous relationship and quest across a widening set of alternate realities.
No, though it helps - Mode is set in the same Proton/Phaze universe and connects to that series' characters and premise, but Colene and Darius's story can be followed on its own.
A suicidal teenage girl from Earth falls in love with a man trapped between realities and discovers a wider structure of alternate 'modes' - realities each governed by different physical or magical laws - that the pair must navigate together.
Yes. All four novels were published between 1991 and 2001, with the final volume, DoOon Mode, arriving several years after the first three.
Reading order last verified .