Lichens provide the best known example of symbiosis, combining fungi and algae in an intimate biological union. This up-to-date account spans their anatomical, morphological, physiological and ecological aspects and provides a modern overview of lichen biogeography and systematics.
It's a pretty thorough introduction into the ecology, physiology and morphology of lichens and as thus works pretty well. Unfortunate for me: Molecular Biology is only talked about rarely.