The anonymous author of this tiny book wrote in the nineteenth century. The translation or R M French is clear and always good.
At the centre of the book lies the idea of learning `to pray without ceasing,' as instructed by St Paul. To this end, the pilgrim of the title learns about the Jesus Prayer, `Lord Jesus Christ, only Son of the Living God, have mercy on me, a sinner.' He then walks through an effectively medieval Russia, all the while learning how to pray this prayer. The book describes his growth in faith, and the wonderful peace that grows deep down in his soul.
The book is therefore moving but also enormously useful. It can be read both as a work of devotion but, more importantly, should be treated as a textbook of how to pray in the Orthodox tradition. Don't treat it as a book for the Orthodox alone, though: it will help anyone and everyone who has the awareness that they need to grow in prayer, and have the discipline to do so.