A practical english grammar - Vyssaja skola 1978
Infinitives as modifiers of nouns
Sound symbols
Various meanings are expressed by the combination of noun and infinitive. The infinitive expresses a potentiality of action on the part of the noun; its meaning may be active or passive, and it may include the idea of necessity as well.
the best book to appear this year (the best out of those that actually appeared)
the next book to appear (the one destined to appear next) work to do (work that must be done)