It says in the extended description that it is the omnibus edition.

This omnibus edition comprises The Black Company, Shadows Linger, and The White Rose—the first three novels in Glen Cook's bestselling fantasy series.

https://www.amazon.com/Chronicles-Black-Company-Book-ebook/dp/B009WUG56M/

Should be this one.

Deal of the day: Chronicles of the Black Company (Chronicles of the Black Company Series Book 1) https://www.amazon.com/dp/B009WUG56M/ref=cm_sw_r_apan_dl_BEM45FAPGGB1EJAG2PS9

It's not super clear what it is, but if you check the product description, it says it's the first three books.

Edit: looks like several people were faster answering, but I'm just going to leave this here.

https://www.amazon.com/Chronicles-Black-Company-Book-ebook/dp/B009WUG56M

Chronicles of the Black Company is the first omnibus, The Black Company, Shadows Linger, and The White Rose are the first three books included in the omnibus, and at $22 dropped down to $3, it's almost sinfully cheap. Strongly recommended for all Abercrombie / Erikson fans.