Your sentence
plus+de+livres+que
Words in this sentence
plus
used to express the comparative and superlative of a following adjective or adverb; more, -er (comparative); most, -est (superlative); more, most (to a greater / the greatest extent); the more ...; more (a greater amount); [with de] more of a following noun; [with de or que] more than a following number or fraction; more, in addition; plus; …
Adverb
de
from (used to indicate origin); of (indicates possession, association or relationship); of (used to indicate cause); of (indicates an amount); used attributively, often translated into English as a compound word; from (used to indicate the start of a time or range); by (an amount); introduces the indirect object of some verbs; variously translated in English; used before infinitive phrases; often corresponding to an English to-infinitive or gerund; after certain verbs; …
Preposition
livre
book; pound (unit of weight); metrical pound, half a kilogramme, 500 g; imperial pound ≈ 454 g; various values between 300 and 600 g; pound (unit of currency); grade (level)
Noun
que
that (introduces a subordinate noun clause and connects it to its parent clause); Substitutes for another, previously stated conjunction.; when, no sooner; Links two noun phrases in apposition forming a clause without a (finite) verb, such that the complement acts as predicate.; introduces a comparison; than; as; only, just; but, nothing but; how (in rhetorical interjections)
Conjunction