Patterns not in a Book?
What's that.... Gotta go
In addition to the eggs that may be triggered by individual or groups of clues, several theories suggest that the pattern of the clues itself may be a clue.
Dot Theory: Beginning with the second clue (9 February), periods appeared in the sequence of entries Spyder made in Cyan Chat. These are different from the series of periods (an ellipsis) that s/he inserted into the first clue. stillclickin first suggested that these periods might be part of a grid pattern that could be entered into the fireplace. Each night's message is transformed into a 1x6 column; each clue or period is a cell in that column; in some cases, the number of cells fall short of 6, in which case the column is filled out with blanks.
A bothersome part of the 16 March clue is the first entry, which is long and signals that this was the last clue. The structure of this clue is different from the others. This makes me wonder whether the first line, which is composed of five sentences, might not be a clue itself.
As a result, this first theory has two variants. The first ignores the first part of the 16 March clue and can be found here; the second inserts the first part into the first row, moving the other parts of that clue down one row, and can be found here. An attractive feature of Dot theory #2 is that it gives the bottom six clues a nice symmetric shape, suggesting they are related somehow.
Line Theory: An alternate theory has been suggested by Dan'ni. This theory takes the lines entered in Spyder's Cyan Chat messages and converts them into cells in an 8x6 grid. I've laid out the messages according to this theory here.
Four Clue Theory: A "mere" apprentice, holger (deep into the second page of this link) has suggested a different theory. holger asserts that there are four clue threads, with the dots acting both to separate the threads and to indicate the absence of a clue for a particular thread. I've interpreted the dots somewhat differently, although perhaps this is what holger meant. A dot indicates an end to a clue for a particular egg. Two consecutive dots therefore indicate a clue thread has been skipped. For example, the last message contained three consecutive dots, which would mean no clue for the first three eggs.
This theory produces a pattern that looks like this. As shown, there is one drawback: It produces a pattern that does not obviously fit into the fireplace. If Spyder's introductory and ending remarks are included, however, then the four threads plus the two sets of remarks would form an 8x6 pattern. I've shown that pattern here.
Sideways Line Theory: Finally, here's a different way of looking at the Spyder messages that ignore the two skipped weeks. If you include the first and last lines of each message, you can construct an 8x6 grid by running the lines horizontally, rather than vertically. I've laid out the messages according to this theory here.
In all cases, whether the cells with clues correspond to blanks or indents is unknown. I've laid out all the theories here in the fireplace grid, interpreting the clues as indents.