Hi, Margareta, welcome to the forum. I see our Levante numbers are growing little by little! You will get lots of good Levante information here, there is a pretty dedicated bunch of Levante pilgrims who are happy to help.
As far as a digital guidebook, there is nothing that I know of. In fact, the only guidebooks to the Levante that I have ever seen are the one published by the Amigos in Valencia in Spanish and English, and the French guide by someone named Gerard. I would highly recommend the Amigos guide, I found it very helpful and very accurate. The maps are also quite good. I used the Spanish version, and I ripped out the information on the Sanabres (from Zamora onwards) as well as some pages on preparing for the camino, historical background, etc, because this guide is a bit heavy. I suppose you could buy it and scan it onto your phone to avoid carrying it.
KinkyOne is in Ourense now, having just completed most of the Levante. He left in early June from Valencia but got caught in that huge heat wave and decided to skip the Toledo to Avila stage. I would do everything possible to avoid having to skip that stage, so maybe an earlier start date is a good idea.
Buen camino, Laurie