Unlike many American Christian churches in the 21st century, the LDS Church does not now have an anti-Masonic position. Although some lingering suspicion continues on both sides, there is no formal barrier preventing a male from being both a member of the church and a Mason, and many have elected to do so. In 2008, Glen Cook, a practicing Latter-day Saint, was made the Grand Master of the Grand Lodge of Utah. Another prominent Latter-day Saint Freemason is Mark E. Koltko-Rivera, who has authored a popular and accessible introduction to Freemasonry entitled "Freemasonry: An Introduction."