The Adventurer's Bride (Harlequin Historical)

is book #366 in the Harlequin Historical line that is sold exclusively online from Harlequin rather in stores.
==Book Description==
In want of a respectable wife… 
Widow Jane Caldwell is practically destitute when famed explorer Nicholas Hurst seeks shelter—with his baby daughter hidden beneath his coat! Wounded and on the run from his enemies, Nicholas is as darkly attractive as she remembers and she can't deny him aid. 
Adventurer Nicholas seeks to settle down, and Jane would make a highly respectable wife! But, cowed by duty for too long, Jane yearns for a love and passion Nicholas cannot give her…until he learns to open his heart.
(Description from harlequin.com)