Welcome to the forums Robert!
I did some searching on Logos.com and in my library and I was unable to find any book length treatment of these two. There are short articles here and there but nothing long and detailed. I my opinion, Logos works best with Bible Study. It's catalog is rather thin when it comes to biographical resources; you will probably need to find another source of information for these two men.
Who's Who in Christian History has about a half page on Carey and 1 1/2 pages on Taylor. Not much, but it may give you some info, but it looks like you are looking for more.
Unfortunately you'll find more quality information on the Internet. Wikipedia has good entries on these guys, as does this site: http://www.wholesomewords.org/biography/bio.html
Hmm. I'm thinking I see a rich source of content for the Personal Book Builder, when it returns.
I Found this:
From the Editors of Christian History Magazine - Foreword by: J.I. Packer
I have the "Christian History Magazine" that provides info. on Hudson Taylor and William Carey....
The “Christian History Magazine” provides a lot of articles about William Carey...
THE NCBSIQ - has: "Brief Life of Carey" - (Nelson's Complete Book of Stories Illustrations)
Hudson Taylor also in “ON This Day” By Robert J. Morgan
I just did a ‘basic search’ on either name and found various places for information in my Logos collection. I would guess you have done that step already - therefore, were you wanting to know what resources could be available for information on these missionaries?
Larry