I would recommend the book "Circumcision, and American health fallacy" by Edward Wallerstein, published in 1980. It shows clearly that evidence has always been skewed, misused or misinterpreted to promote circumcision even as the rationale changed. It's a book that explores all the medical evidence used from 1870 to 1980. (1)
There is no such thing as unbiased information about routine infant circumcision. People either promote it or are against it. This is different from medically needed surgeries, even medically needed circumcisions (where it was performed to correct a condition or pathology of the penis).
Those who promote infant circumcision are based on interpreting statistics to suggest benefits while dismissing any discussion of the functions and value of the foreskin.
Those who are against it interpret the statistics as well, but are also based on the discussion of the sexual functions of the foreskin, and also on the ethical value of self-determination. These structures have been documented by John Taylor (1996-1999)(2), and the sexual effects of circumcision have been documented by Sorrells (2007)(3), Frisch (2011)(4), and more recently Bronselaer (2013)(5)
An important point is that there are adults today who wish they had not been circumcised in infancy. This has been documented by Tim Hammond since 1999(6). This is important because circumcision is not essential for prevention as vaccines are, but it is an irreversible procedure that removes structures that cannot be re-generated. In absence of absolute medical necessity, the removal of this tissue in infancy constitutes a violation of that right to self-determination, and an injury that cannot be repaired.
This is important because we don't see patients complaining from life-saving surgeries. The fact that some circumcised men resent that they were subjected to this surgery shows that it shouldn't be someone else's right to alter a person's body.
The fact that we look for "medical benefits" to justify perpetrating that injury shows that there is something wrong in the thought process.
Circumcision has serious risks and harms. Some of the harm is not the result of a risk, but a normal result of the procedure, as has been documented by the Global Survey of Circumcision Harm (2012) http://circumcisionharm.org/
(1) Wallerstein, E. Circumcision, an American health fallacy. Springer series. Published 1980. http://www.amazon.com/Circumcision-American-Health-Fallacy-Springer/dp/0826132413/ref=sr_1_1?ie=UTF8&qid=1362500156&sr=8-1&keywords=circumcision+an+american+health+fallacy
(2) Taylor, JR. The prepuce: Specialized mucosa of the penis and its loss to circumcision. BJU, Volume 77, Pages 291-295, February 1996. http://www.cirp.org/library/anatomy/taylor/
(3) Sorrells ML. Fine-touch pressure thresholds in the adult penis. BJU Int. 2007 Apr;99(4):864-9. http://www.ncbi.nlm.nih.gov/pubmed/17378847
(4) Frisch M. Male circumcision and sexual function in men and women: a survey-based, cross-sectional study in Denmark. Int J Epidemiol. 2011 Oct;40(5):1367-81. doi: 10.1093/ije/dyr104. Epub 2011 Jun 14. http://www.ncbi.nlm.nih.gov/pubmed/21672947
(5) Bronselaer GA. Male circumcision decreases penile sensitivity as measured in a large cohort. BJU Int. 2013 Feb 4. doi: 10.1111/j.1464-410X.2012.11761.x. [Epub ahead of print] http://www.ncbi.nlm.nih.gov/pubmed/23374102?dopt=Abstract
(6) Hammond T. A preliminary poll of men circumcised in infancy or childhood. BJU Int. 1999 Jan;83 Suppl 1:85-92. http://www.ncbi.nlm.nih.gov/pubmed/10349419 Full text http://www.noharmm.org/bju.htm