Previously had virtually any notebook a pen holder, which I found very convenient. That there are just some of the brand books no longer, although the already're quite expensive. Lighthouse has since let now come up with something. Penholder for retrofitting in all colors, which is also available in the notebooks. That's only once quite nice, but means that you again have to spend money. The penholder is self-adhesive, but unfortunately has to be glued to the bag that is at the end of the notebook. I think that now is not so great. In addition, the rubber is very tight and you can only use very thin pens that you really get only with gentle force from the strap. Add to this that the pen holder can be used only once. Once it is stuck, it can not be removed. Except you will burst the bag, but that does not want you then, too. On the one hand a great idea, then I think that's money making, because for me is one of the penholder actually the notebook and this should be included. That is why there are only 3 out of 5.