The Constant Variable

In a world governed by strict rules and unpredictable reactions, Alex Hayes proved to be the constant variable she never planned for.

​Isabella Rossi doesn't lose. As a fiercely driven neuroscience researcher at a top British university, she has zero room for distractions-especially not from Alex Hayes.

​Alex is brilliant, effortlessly arrogant, and entirely too good at unravelling her iron-clad composure. Locked in a relentless competition for the same elite grant, they spend their days trading sharp insults in the lab and their nights pushing each other's limits over text. Underneath the academic rivalry, however, a high-stakes wager hangs silently in the balance-one final, reckless challenge designed with a single goal: to push her straight into his bed.

​They know everything about the brain, but no amount of science can prepare them for a dangerous shift from hatred to obsession.

​They know every rule of the mind. Too bad they're about to break every single one.