Looks like we'll be getting a definitive guide on the Takara Diaclone toys from Happy Japan in July. The product listing doesn't say much, though its pretty same to assume what we will see. The listing does give us information that the Diaclone book will also include a digital data collection DVD including historical catalogues and memorable TV CM that colored the world of Diaclone with fascinating stories and illustrations! The Japanese language book is listed for 3,780 JPY / $35 USD to ship next month. 
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