Hey Splat how are you getting on with this? Dr Rob marshals book is also very very good, regardless of price it us well worth it! Also I am not sure but I can send you some notes from my microbiology course on staining slides etc if you are interested! I have had a few crop flushes under the microscope now and was totally blown away by some if the stuff that us found under the microscope! If you would like anything I have text books coming out the wazoo on microorganisms, pH tolerances, etc etc!