16. A system comprising: a memory configured to store computer-executable instructions; and a processor in communication with the memory configured to execute the computer-executable instructions to at least: determine at least a portion of a text string associated with an electronic book; determine one or more nouns in the text string; associate each of the one or more nouns with one or more characters so as to create a set of characters for the electronic book; determine one or more verbs in the text string, each of the one or more verbs representing an action between one of the characters of the set of characters and at least one other of the characters of the set of characters; generate a character graph that represents relationships between the one or more characters based at least in part upon the one or more verbs and the actions between the one or more characters, the one or more characters represented as nodes in the character graph; calculate a number of the nodes in the character graph; compare the number of the nodes to a character threshold; and determine a maturity level of the electronic book based in part on the comparison of the character threshold with the number of the nodes in the character graph.
16. A system comprising: a memory configured to store computer-executable instructions; and a processor in communication with the memory configured to execute the computer-executable instructions to at least: determine at least a portion of a text string associated with an electronic book; determine one or more nouns in the text string; associate each of the one or more nouns with one or more characters so as to create a set of characters for the electronic book; determine one or more verbs in the text string, each of the one or more verbs representing an action between one of the characters of the set of characters and at least one other of the characters of the set of characters; generate a character graph that represents relationships between the one or more characters based at least in part upon the one or more verbs and the actions between the one or more characters, the one or more characters represented as nodes in the character graph; calculate a number of the nodes in the character graph; compare the number of the nodes to a character threshold; and determine a maturity level of the electronic book based in part on the comparison of the character threshold with the number of the nodes in the character graph. 19. The system of claim 16 , wherein the one or more verbs are associated with one or more weights, the one or more weights associated with a complexity of the one or more verbs, and wherein determining the maturity level of the electronic book comprises utilizing the one or more weights associated with the one or more verbs.