Layer Estimates:

Layer: Mapbook Pages 400-Scale (ID:0)
Count: 341
Extent:

XMin: -9824131.89445462
YMin: 5011127.73937744
XMax: -9742978.93004079
YMax: 5056819.76369176
Spatial Reference: 102100 (3857)

Layer: Mapbook Pages 100-Scale (ID:1)
Count: 593
Extent:

XMin: -9824087.22227381
YMin: 5011287.81871609
XMax: -9743037.55455432
YMax: 5056575.28117863
Spatial Reference: 102100 (3857)