I think this is the same resource - with different prices:
https://www.logos.com/product/32253/catholic-scripture-study-international-advent-preparing-for-christ-cycle-b?utm_source=logos-web-app&utm_medium=general-upsell&utm_content=resource-null
https://www.logos.com/product/162830/advent-preparing-for-christ-cycle-b?utm_source=logos-web-app&utm_medium=general-upsell&utm_content=resource-null
No. One is the book, the other - interestingly the cheaper one - is a bundle containing the book and the small CSS Group Leader Guide (16 pages). You see this on the bundle's product page - and on the book's, that it is included in the bundle.
Thanks, @NB.Mick. @Logos: Feel free to delete this erroneous bug report.
