The microbiology textbook that I use as a reference has many properties including volume, weight, flammability, ability to absorb heat according to its specific heat capacity. This is indicated by the equation q=mcΔT
Where q = quantity of heat in Joules (J)
m = mass of the substance in grams (g) *remember that 1 mL = 1 g
c = specific heat capacity
I would imagine that the specific heat capacity of this book is between 0 and 2. When I eventually work this out I will get back to you.
I also find it useful as a reference, mostly for microbiology. If it has any other utilities I will let you know. I am unsure of its utility as a barter object, this may depend on its specific heat capacity.