I read them all and some three times. I have them all on a bookshelf on the landing outside the bedroom and I have just finished 'The Long Earth' which while co written by Sir Tel, is very different although the humour and turn of phrase is still comedic in places.

If you haven't read them all rejoice! because, you have a great treat in store.

Reading them in order is a good idea 'I think'.

Oook