Fifty Shades of Grey by E.L.James presently has a hold list of 491. If you are one of those people patiently waiting in line, try one of these readalikes in the meantime:
The Edge of Impropriety by Pam Rosenthal
Riding on Instinct by Jaci Burton
Selfish is the Heart by Megan Hart
Tempt Me with Darkness by Shayla Black
Sweet Addiction by Maya Banks