`` i taught myself when i was on the river . with that , he straightened up and took her hand to lead her out of the library . and the look on that face is worth all the risk . i think he 's probably flirting with the cashier , or she 's flirting with him . he asked , his voice a quiet rumble . `` i assure you , that did not enter into my decision . '' at her rapid questions he paused and looked down at her . he stopped keeping them in his wallet some time ago . 