Jennifer Owen's book "Wildlife of a garden - a thirty year study" was published in 2010 by the RHS.  It, and its predecessor "The ecology of a garden- the first fifteen years" (CUP 1991) remain the most complete  record of the creatures to be found in an "ordinary" garden. Theyare seminal in the development of garden ecology as a subject. See our leaflet on her studies here, and a summary of the numbers of species she found here. 
Jennifer Owen was awarded the Royal Horticultural Society’s Veitch medal, having " made an outstanding contribution to the advancement and improvement of the science and practice of horticulture”