These are referred to, here locally, as "Chinese Stockbooks" (without stamps) Made of recycled cardboard, and tend to attract moisture in dubious storage locations. Not widely appreciated. Value : Possibly $1-$2 a book. I have tens of them empty.
The stamps are nice, the beginnings of a nice collection. I'll let others suggest a value.
rod222's price of $1-2 may be referring to an empty stockbook. I would value it at $0. But the stamps are very nice with a lot of variety. Nothing jumps out as being valuable, though. The stamps in one stockbook could bring $5-10.
Roughly 750 stamps. At 2 cents each $15, at 4 cents each $30. Of course, someone might see an unusual cancel or something. You will probably be closer to the lower number. Maybe the next book will have something more easily identified in the $1 to $5 range or better.