‘Lock me in any cell in any prison anywhere at any time, wearing only normal clothes and I’ll escape in a week.’
For Professor Van Dusen, otherwise known as ‘The Thinking Machine’, nothing is impossible. Logic is his passion. One hour later he finds himself locked up in Chisholm prison and has to use all his mental resources to find the solution to the problem.

Dossiers:
Other Prison Stories
Futrelle’s Death on the Titanic

Coleccion de lecturas graduadas ilustrada y con actividades para alumnos de niveles desde principiantes hasta avanzados. - Las notas a pie de pagina facilitan la comprension del texto. - Las actividades didacticas van dirigidas a la comprension oral y escrita.