'The strength of the book lies in the comparative and interactive consideration of many taxa and phenomena and the overall phylogenetic background. Of particular use are the well-done reviews of relevant literature on the reproductive biology of various families ... the book is a must for everyone who is interested in reproductive biology of annelids.' Spixiana, 24:2 (2001) '...it is of fine quality... excellent illustrations... it will appeal primarily to annelid specialists, but it will also be of interest as an occasional reference to those with more general interests in animal development and life histories.' American Zoologist, 40 (2000)