I did a search on internet and saw the problem is common on still other android devices than mine. But nowhere a solution. It becomes boring from around page 20 as you can't use the 'contents' to jump to the individual chapters. Does anyone know a solution please? OR for the device by downloading one or another app, OR for the ebook with an alternative or adapted way to build the 'contents' page? Or is .pdf not really to be read on android? What format is most popular on android? But after all I would like most of all to adapt my .pdf's. Thanks a lot.