My book is gone, could someone help me.

[#1]

Last weekend I made a 240 pg book with Lightroom 6. Yesterday I imported 66 photos into Lightroom and now I can not find the book or previous photos. At the top, lightroom now says "lightroom catalog.Ircat" and I can only see the 66 photos. Could you help me find where my book and previous 2,000 photos went? (thank you)

{Moved from Lightroom Cloud to Lightroom Classic Forum by Moderator}

[#2]

Sounds like you may have started a new Catalog.

From the Lightroom Menu go 'FILE > Open Recent'  and check if there is another CATALOG that has the other 2000 photos referenced.

(Catalogs are like Address Books- You can have 2000 people in one book and 66 people in another.)