This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The Programmer's Guide probably goes into a lot of depth on that. USD 50 doesn't seem much for such a specialized library, and it actually saves your company money if it even saves you as little as 2 hours time.