When facing towards the air and opening the book, the client kicks the user from the server. When the book is opened towards a nearby block (and the block is within clickable range), the book opens with no issues. This looks to be a server related issue as seen by the Server log since the client log contains nothing about the issue. Server is a home server running Windows 7, Java 1.8.0v45. I don't think it is a specific java issue because the Eureka book opens fine when "used" on a nearby block.

Eureka version: EUREKA-1.7.10-3.0.2
ModPack: AT Launcher Resonant Rise 3.2.6.3

Server Log at the time of disconnect::
[20:49:22 WARN]: Failed to handle packet for /192.168.0.200:63395
java.lang.NullPointerException
at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:918) ~[nh.class:?]
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60) ~[jo.class:?]
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9) ~[jo.class:?]
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:244) ~[ej.class:?]
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [nc.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:980) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:430) [lt.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:798) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:658) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]

Client log results at the time of disconnect:
[27/5/2015 20:49:22 PM] [20:49:22] [Netty Client IO #0/INFO] [THAUMCRAFT]: Restoring client configs.
[27/5/2015 20:49:22 PM] [20:49:22] [Netty Client IO #0/INFO] [simplyjetpacks]: Loading configuration files
[27/5/2015 20:49:22 PM] [Client thread/INFO] [journeymap]: Mapping halted in USERSDIR\Instances\TestPack\journeymap\data\mp\LocalHost\DIM0
[27/5/2015 20:49:22 PM] [Client thread/INFO] [FML]: Applying holder lookups
[27/5/2015 20:49:22 PM] [Client thread/WARN] [FML]: Unable to lookup CompactMachines:interfaceblock for public static org.dave.CompactMachines.block.BlockCM org.dave.CompactMachines.init.ModBlocks.interfaceblock. Is there something wrong with the registry?
[27/5/2015 20:49:22 PM] [Client thread/WARN] [FML]: Unable to lookup chisel:cobblestoneWall for public static com.cricketcraft.chisel.block.BlockMarbleWall com.cricketcraft.chisel.init.ChiselBlocks.cobblestoneWall. Is there something wrong with the registry?
[27/5/2015 20:49:22 PM] [Client thread/WARN] [FML]: Unable to lookup chisel:obsidian2 for public static com.cricketcraft.chisel.block.BlockCarvable com.cricketcraft.chisel.init.ChiselBlocks.obsidian2. Is there something wrong with the registry?
[27/5/2015 20:49:22 PM] [Client thread/INFO] [FML]: Holder lookups applied
[27/5/2015 20:49:26 PM] [Client thread/INFO] [Mekanism]: VoiceServer: Stopping client connection...
[27/5/2015 20:49:26 PM] [Client thread/INFO] [Mekanism]: Finished loading Cardboard Box blacklist (loaded 0 entries)
[27/5/2015 20:49:26 PM] [Client thread/INFO] [Mekanism]: Reloaded config.

This is happening on our server as well using version 3.0.2

[09:46:11 WARN]: Failed to handle packet for /192.168.1.6:51836
java.lang.NullPointerException
at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:918) ~[nh.class:?]
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60) ~[jo.class:?]
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9) ~[jo.class:?]
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:244) ~[ej.class:?]
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [nc.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:980) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:430) [lt.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:798) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:658) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_79]
[09:46:11 INFO]: CuppyCake lost connection: Internal server error

sorry for not replying sooner, i am not sure what is heapening here cause it works fine for me and alot of others, i'll contact the RR devs and try to narow down the cause

It doesn't disconnect or crash on Single Player. Only on a server It seems.