I’m currently reading Life After Death According to Orthodox Tradition by Jean Claude Larchet. I recommend it to those who perhaps wish to reignite their zeal and also for those for whom the Tollhouses can stoke fear or despair. It’s an evenhanded explanation which can be a little more palatable than some. It also draws parallels between Church tradition and secular accounts of clinical death or near-death experience and it’s a good accompaniment to Fr Seraphim’s The Soul After Death.
I have also read the lives of Matrona of Moscow, Seraphim of Vyritska and St Alexander of Svir. For those learning Russian, you can download the LitRes app, purchase cheap lives of Saints and export the file to an e-reader or to your computer with ease. The language is often very simple and you can read in tandem with a Russian dictionary