There are many excellent ones put out by Lifeway.  Two come to mind right off the bat:

Experiencing God

The Mind Of Christ

Both of these are studies that will take you months, but can be done in minutes in a day.  They both will really open your eyes to who God is and what He is doing.  I'd highly recommend both.

Both of these are meant to be done as a group study, but I have done both as an individual study and they worked fine that way as well.  All you need for these is your Bible, the workbook, and a pen or pencil.

Maybe something by Priscilla Shirer.  I've done some of hers & don't recall them be too lengthy. 

I was recently looking for the options for workbook Bible study and happened to come across a website for "Watermark Community Church" that has a chart listing features of 5 different OT Bible study workbooks.  They may have some info somewhere else on the site for NT.

You can also go to Christian Book Distributors.com for thousands of different resources - fiction, Bible study, DVD, music, you name it.

Good luck - I will be watching this topic to see the recs you come up with.  Don't forget too that sometimes the best workbook it just a blank notebook! :)

I took Elizabeth's George's bible study "A Woman After God's Own Heart" last year.  It was very good but it took me about an hour each night to do the work in the workbook.

I just finished Beth Moore's bible study "Psalms of Ascent" and loved it.  The workbook took about 15 minutes or so a night to complete.

I hope this helps.

Christine

I actually have 2 on my shelf that I absolutely loved!  Both of these were just a few minutes a night or so to do but very educational.

He Speaks to Me: Preparing to Hear From God by Priscilla Shirer (taken)

Invitation to the Old Testament: Disciple Short-term Studies, Participant's Book
Author: Celia Brewer Sinclair

The Invitation is an in-depth study of the Old Testament.  This is the first one that I have done that really soaked in about the Old Testament.  My husband and I thoroughly enjoyed it and refer to it's contents often.

Both of these are on my shelf along with other spiritual books including Max Lucado.  I am open to offers, please PM me if you are interested.

While this topic is still kind of active..... does anyone know any good bookstudies for groups, not just women? Our bible study is kinda in between segments right now until we can find something of interest to study... any suggestions would be great! Thanks ahead of time

If you want group studies, then I highly recommend anything put out by Serendipity House.  They have some great group discussion guides that are great.

Try the Women of Faith Study series.  They have about a dozen and each lesson can be done in about 45 minutes to an hour with only a Bible.  You could split that into 10-15 minutes a day easily.  I'm doing "Encouraging One Another" right now with a group of ladies at work.  It is excellent, but I'm sure the others are too.

Also Kay Arthur has some good 40-minute studies.  I've done a couple of those, but it's been a few years.

I've done a couple Elizabeth George studies too and her stuff is very good, but a little more time consuming I think.

Priscilla Shirer's studies also take a little longer (30-45 minutes a day) and Beth Moore's can take up to an hour or more a day.

Someone mentioned Experiencing God and that is a dynamite study.  I did it about 10 years ago so I can't remember how much homework time there was, but the things I learned were so foundational for my faith that I still remember them.

Dee Brestin (I think that is the correct spelling) also has a lot of goo women's studies and they don't take more than 15-20 minutes a day to do.

Hope that helps some if you are still looking.

As a reader, I highly, HIGHLY recommend the Liz Curtis Higgs "Bad Girls" series. There's Bad Girls of the Bible, Really Bad Girls of the Bible and Slightly Bad Girls of the Bible, as well as Unveiling Mary Magdalene. She (the author) calls it a "novel approach to Bible study" and writes a contemporary short story based on a Biblical character and then goes verse by verse through the actual Biblical account. The books themselves have several study questions, but each one has a corresponding work book divided into seven day segments for each story. I've led these and had a great response. Enjoy and blessings to your group.

Diane

I have some Bill Bright unused study guides.  You just go in and fill them in.

Sue

I am currently doing Fingerprints of God, by Jennifer Rothschild and enjoying it very much.

I would also recommend The Virtuous Woman, Shattering the Syperwoman Myth, by Vicki Courtney.  It is a LifeWay study.

Creflo Dollar has some books with study questions at the end of the chapters that are enjoyable, such as Walking in the Confidence of God in Troubled Times, Breaking out of Trouble,  Love, Live and Enjoy Life and In the Presence of God.

Breaking Out of Trouble & Love, Live and Enjoy Life are from the Life Solution Series.

Enjoy.