If you had an account on the old 100 Day Marathon Plan site, you still have access. Use your original sign-up email address as both username and password to log in below. After logging in, you can change your password in your account portal.
For Norwegian readers
LØPING! Raskere og skadefri
A Norwegian-language book for runners at all levels.
Also available in English
The Norwegian Method Applied
A deeper English-language guide to threshold training and intensity control.