Books give tables of the heat of formation rather than combustion because from a "limited" (=huge but always insufficient) dataset you can deduce the heat of many more reactions, including combustions.
But you are supposed to make this deduction. That is, find the heat of formation of all reactants and products, and combine them to get the heat of reaction - here a combustion.
In this operation, especially for combustions, check carefully the aggregation state of the reactants and products, notably water, which can be liquid or gaseous. In a boiler it can be both, and this makes a difference in the harvested heat and the fuel efficiency. In a bear it must be both at the same time, since some water is excreted and some is perspired including in breath, so check for additional information, or maybe decide that fur animals perspire little.
Irrelevant in this present question, but important elsewhere: keep in mind that the heat of formation refers to the elements in their standard state, not to separated atoms.